Fill in the blanks:

A _________ is a mutable sequence of data elements indexed by their position.

Fill in the blanks:

_________ means accessing or visiting or processing each element of any data structure.

Fill in the blanks:

Consider the following operations done on Stack:

push(5)

push(8)

pop()

push(2)

push(5)

pop()

pop()

pop()

push(1)

pop()

The output of the above snippet is _________.

Fill in the blanks:

In the Stack, if a user tries to remove an element from the empty Stack, it is called _________.