I am really confused on how to identify the solution to Lab 2. Can you help?

Someone else sent an email about Lab 2.  I'll post a general summary of what I sent so everyone can benefit.

t, o, b, and r are created within the Constructor and don't exist outside the scope of that constructor.  The official name for them are "method parameters".  Private class fields like accountType can't be accessed outside the scope of the SavingsAccount class.  But what we can do is supply values to t, o, b, and r by calling the constructor.  This is done in the main method where savings account instances are created.  To do any sort of calculations with these values later, we need to somehow get these values out of the constructor and store them somewhere a little more permanent.  That's why the constructor takes these values and uses them to set the initial values of each class field.  A class can access and change its field values whenever it wants.

You may also see people who name their constructor variables the same as their fields.  When this happens, they use the keyword "this" to differentiate the field from the temporary constructor variable:

public class SavingsAccount {    //Fields    private String accountType;    private String accountOwner;    private double balance;    private double interestRate;    private int accountNum;    private static int nextAccountNum = 1;  //Constructor    public SavingsAccount(String accountType, String accountOwner, double balance, double interestRate){        this.accountType = accountype;        this.accountOwner = accountOwner;        this.balance = balance;        this.interestRate = interestRate;        setAccountNumber();