Please answer the following multiple choice questions and provide a written explanation for each answer.

39. The drawbacks of the array-based implementation of queues stem from a. the fact that arrays are of fixed size b. the complex logic required to implement floating front and rear c. the need to shift array elements before the enqueue operation. d. the lengthy code recuired to implement the queue operations. e. the need to shift array elements after the dequeue operation f. the fact that the array-based queue operations cost (n) g. none of the above 40. searching a sorted array, the search algorithm with the simplest logic is a. binary search. b. hashing. c. sequential search. d. dictionary search. e. self-organizing list. f. replacement selection g. none of the above