Instructions

Complete Java class InNOut.java. Specifically, flesh out the following methods:

InNout.pop: Remove and return an item from the beginning of the underlying

array. If there are no items to remove, return null. Remaining items are shifted

to the front of the array, and emptying places at the back of the array are filled

with nulls. The method returns the string at beginning of array or null if the array

is empty.

InNout.peek: Take a look at the value of the item in the front of the array,

without removing it. If they array is empty, return null. The method returns the

string at beginning of array or null if the array is empty.

InNout.append: Add a string after the last (most recently added) item in the

array. The method returns true if addition was successful, false otherwise.

Please do not change the test code in Java class Main.java. Also, please do not change the headers

of the methods in class InNOut.java. If your code works as expected, Main.main will show successful

completion of four tests.