Implement the stack of int class by extending the arraylist class. it should contain the following methods:

• size() return the size of the list
• peek() returns the top integer
• pop() returns the top integer and returns it.
• push(int) adds an integer to the top of the stack
• tostring()
• equals()
note: some of the methods might be already implemented in the arraylist class and you will not need to implement them.