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1. Give pseudocode descriptions for the retainAll and removeAll methods of the set ADT, assuming…

1. Give pseudocode descriptions for the retainAll and removeAll methods of the set ADT, assuming…

1. Give pseudocode descriptions for the retainAll and removeAll methods of the set ADT, assuming we use sorted sequences to implement sets.2. Suppose we modify the deterministic version of the quick-sort algorithm so that, instead of selecting the last element in an n-element sequence as the pivot, we choose the element at index ⌊n/2⌋. What is the running time of this version of quick-sort on a sequence that is already sorted?