Question: Assume that language SL includes a stack data structure and three operations: NewTop(S,E) which adds the element E to the top stack S, popTop(S), which

Assume that language SL includes a stack data structure and three operations: NewTop(S,E) which adds the element E to the top stack S, popTop(S), which deletes the top element of the stack S, GetTop(S) which returns a pointer to the location in stack S of the current top element. What is wrong with the design of these three operations? How could they be redefined to correct the problem?

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