udated the README file with my responses

README.md

@@ -22,12 +22,16 @@ Work through all these exercises. You edit this file with your answers for these
 
 ### Exercise 2.2
 * What value is returned if you check the machine’s balance after it has printed a ticket?
+	* The value is 0.
 
 ### Exercise 2.3
 * Experiment with inserting different amounts of money before printing tickets.
 	* Do you notice anything strange about the machine’s behavior?
+		* Yes, the machine does not behave correctly if too much or too little money is inserted.
 	* What happens if you insert too much money into the machine – do you receive any refund?
+		* You do not receive a refund or more than one ticket. The balance just returns to zero once a ticket is printed.
 	* What happens if you do not insert enough and then try to print a ticket?
+		* The machine does not recognize that not enough money was entered. It tells you your total is whatever amount was entered and prints the ticket. Then balance returns to zero.
 
 ### Exercise 2.4
 * Try to obtain a good understanding of a ticket machine’s behavior by interacting with it on the object bench before we start looking at how the `TicketMachine` class is implemented in the next section.
@@ -36,32 +40,43 @@ Work through all these exercises. You edit this file with your answers for these
 * Create another ticket machine for tickets of a different price.
 	* Buy a ticket from that machine.
 	* Does the printed ticket look different?
+		* It shows a different ticket price but otherwise looks the same.
 
 ### Exercise 2.6
 * Write out what you think the outer wrappers of the `Student` and `LabClass` classes might look like – do not worry about the inner part.
+	* public class Student {}
+	* public class LabClass {}
 
 ### Exercise 2.7
 Does it matter whether we write<br>
 `public class TicketMachine`<br>
 or<br>
 `class public TicketMachine`<br>
-in the outer wrapper of a class?
+in the outer wrapper of a class? - yes
+
 
 * Edit the source of the `TicketMachine` class to make the change and then close the editor window.
-	* Do you notice a change in the class diagram?
+	* Do you notice a change in the class diagram? 
+		* yes - TicketMachine now has a red hatch pattern
 	* What error message do you get when you now press the compile button?
+		* "Illegal start of an expression"
 	* Do you think this message clearly explains what is wrong?
+		* It's mostly clear. It indicates that you cannot start the expression with 'class'
 
 ### Exercise 2.8
-* Check whether or not it is possible to leave out the word `public` from the outer wrapper of the `TicketMachine` class.
+* Check whether or not it is possible to leave out the word `public` from the outer wrapper of the `TicketMachine` class. - this does still work
 
 ### Exercise 2.9
 * From your earlier experimentation with the ticket machine objects within BlueJ you can probably remember the names of some of the methods – `printTicket`, for instance.
 	* Look at the class definition in Code 2.1 and use this knowledge, along with the additional information about ordering we have given you, to try to make a list of the names of the fields, constructors, and methods in the `TicketMachine` class.
+		* fields - price, balance, total, ticketNumber
+		* constructors - TicketMachine
+		* methods - getPrice(),  insertMoney(), getBalance(), printTicket(), getTicketNumber(), calculateTotal(), incrementTicketNumber(), printTicket()
 	* Hint: There is only one constructor in the class.
 
 ### Exercise 2.10
 * Do you notice any features of the constructor that make it significantly different from the other methods of the class?
+	* it has the same name as the class it's defined in
 
 ### Exercise 2.11
 * What do you think is the type of each of the following fields?
@@ -71,6 +86,7 @@ private int count;
 private Student representative;
 private Server host;
 ```
+* int, Student, Server
 
 ### Exercise 2.12
 * What are the names of the following fields?
@@ -80,43 +96,55 @@ private boolean alive;
 private Person tutor;
 private Game game;
 ```
+* alive, tutor, game
+
 ### Exercise 2.13
 
 In the following field declaration from the TicketMachine class<br>
 
 ```java
 private int price;
 ```
+
 does it matter which order the three words appear in?
 * Edit the `TicketMachine` class to try different orderings. After each change, close the editor.
 	* Does the appearance of the class diagram after each change give you a clue as to whether or not other orderings are
 possible?
+		* yes, they do not seem possible
 	* Check by pressing the compile button to see if there is an error message.
-	* Make sure that you reinstantiate the original version after your experiments!
+		* yes
+	* Make sure that you reinstantiate the original version after your experiments! - done
 
 ### Exercise 2.14
 * Is it always necessary to have a semicolon at the end of a field declaration?
+	* yes
 * Once again, experiment via the editor.
 * The rule you will learn here is an important one, so be sure to remember it.
 
 
 ### Exercise 2.15
 * Write in full the declaration for a field of type `int` whose name is `status`.
 
+	* public int status;
+
 ### Exercise 2.16
 * To what class does the following constructor belong?
 ```
 public Student(String name)
 ```
 
+* Student
 ### Exercise 2.17
 * How many parameters does the following constructor have and what are their types?
 ```
 public Book(String title, double price)
 ```
 
+* 2 parameters
 ### Exercise 2.18
 * Can you guess what types some of the `Book` class’s fields might be?
+	* int, String, boolean
 * Can you assume anything about the names of its fields?
+	* their accessibility would extend throughout the class in which they are defined
 
 READ upto and INCLUDING section 2.15 of this chapter.