stion 5 If arr is an array of integers, then a[i] is equivalent to Fet ered Select one: ed out of *a + i lag question O b. a + i *(a + i) d. none of the above on 6 A data structure in which elements can be inserted or deleted at/from both ends but not in the middle is? out of Select one: a. Dequeue Question O b. Priority queue C. Circular queue O d. Queue