QUESTION 9 The following PDA works for language L = {anbmcn n, m 0). X is the PDA start symbol 0 is the initial state, and 3 is the final state. One instruction is missing the stack operation. What is the missing stack operation? (0, A, ?, ???, 3) (0, a, X, push(A), 0) (0, a, A, push(A), 0) (0, b, X, nop, 1) (0, b, A, nop, 1) (0, c, A, pop, 2) (1, b, X, nop, 1) (1, c, A, pop, 2) (2, A, X, nop, 3) (2, c, A, pop, 2) pop A. nop 08 push(C) OD push(B)