A STACK is based on an array of 8 chars. Fill in the spaces as indicated. (For notational convenience, we use _ to denote an empty memory cell.) E.g. POP(STACK) is to delete the top element and put it away in a dummy cell ITEM. Here we use POP as deletion, and PUSH as insertion. STACK: A, C, D, F, K, _, _, _ (a)POP (STACK) (b)POP (STACK) (c)PUSH (STACK, L) (d)PUSH (STACK, P) (e)POP (STACK) (f)PUSH (STACK, R) (g)PUSH (STACK, S) (h)POP (STACK) Starting A, C, D, F, K, _, _, _