- Suppose that you are building a class Account. - Suppose that the class has a boolean variable open, as well as an int variable balance that is to be in the range -1,000 to 1,000. - Suppose that you want to implement a method add(int anAmount) that adds anAmount to balance, and returns the new value of balance. - Also, assume that this method is meant to be called only if the value of open is true.

a. Write the Preconditions b. Write the Postcondition c. Write the Returns