These operations are called on a Stack : push(8), push(1), push(6), push(7), pop(), pop(), pop(), push(2), pop(). What is the data at the top position?A7B6C8D2

How many numbers will the stack contain after the following operations on a stack of size 7?Push(8);Push(0);Pop();Push(2);Push(3);Pop();Push(4);Pop();Pop();Pop();Push(5);a) 1b) 2c) 3d) 4

What are the two primary stack operations?*1 pointa. Add and Subtractb. Push and Popc. Insert and Deleted. Get and Set

A stack is implemented using an array and the top is always pointing to the first position in the array. Assuming the stack is not empty, the time complexities of push() and pop() operations are:Group of answer choicesO(n) and O(1)O(n) and O(n)O(1) and O(n)O(1) and O(1)

Consider the stack data structure, supporting two operations push and pop, as discussed in class.Suppose that for the above sequence, each letter (such as E) corresponds to a push of that letter ontothe stack and each asterisk (*) corresponds a pop operation on the stack. Show the sequence of valuesreturned by the pop operations

Suppose someone designed a Stack data abstraction with the following operations:(a) Push: Adds an element on top of the stack.(b) Pop: Removes the top element from the stack.(c) Top: Returns a pointer to the top of the stack.Give your critical comment on the design of this data abstraction.