by python

(a) What values are returned during the following sequence of queue opera- tions, if executed on an initially empty queue? enqueue(5), enqueue(3), dequeue) enqueue(2), enqueue(8), dequeue(), dequeue(), enqueue(9), enqueue(1), de- queue), enqueue(7), enqueue(6), dequeue), dequeue0, enqueue (4), dequeue(), dequeue (b) WhatvaluesarereturnedduringthefollowingsequenceofdequeADTop- erations, on initially empty deque? add first(4), add last(8), add last(9), add first(5), back), delete first), delete last), add last (7), first0, last(), add last(6), delete first(), delete first()