Question: Suppose the ArrayList implementation of Section 16.2 had a removeLast method that shrinks the internal array by 50 percent when it is less than 25

Suppose the ArrayList implementation of Section 16.2 had a removeLast method that shrinks the internal array by 50 percent when it is less than 25 percent full. Show that any sequence of addLast and removeLast calls has amortized O(1) efficiency.

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