a) For each of the following scenarios choose the “best" data structure from the following list or a combination of data structures: an unsorted array, linked list, DLL, circular LL, stack, queue, BST, Heap, Graph. In each case, justify your answer briefly. i. When the developer needs constant time for insertion and deletion and Insert the element in any position of the list. ii. Implement the Most Recently Used (MRU) list. iii. Find the name in the phone book. iv. Implement Priority Queue with efficient time complexity Find the optimized route between the cities. v.

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