What is the role of the top variable in a stack implementation?*1 pointa. It stores the value to be pushed.b. It tracks the most recently added element.c. It points to the bottom of the stack.d. It manages the display operation.

17. What is the role of the top variable in a stack implementation?a. It stores the value to be pushed.b. It tracks the most recently added element.c. It points to the bottom of the stack.d. It manages the display operation.18. What is a potential limitation of array-based stacks?a. Limited by the fixed size of the arrayb. Can lead to stack overflowc. Offers dynamic sizingd. Requires additional memory for pointers19. In the C++ code for pushing elements onto a stack, what is stack[top] = x; doing?a. Removing the top elementb. Initializing the stackc. Adding an element to the stackd. Checking if the stack is full20. In the C++ code for displaying elements in a stack, what does the loop for(i = top; i >= 0; i--)do?a. Adds elements to the stackb. Removes elements from the stackc. Checks if the stack is emptyd. Displays elements in reverse order

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.

In the C++ code for displaying elements in a stack, what does the loop for(i = top; i >= 0; i--) do?*1 pointa. Adds elements to the stackb. Removes elements from the stackc. Checks if the stack is emptyd. Displays elements in reverse order

What happens if you call top() on an empty stack in C++?It returns 0It throws an exceptionIt returns a garbage valueIt returns the last element pushed onto the stack

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