An LM flip-flop works as follows: If LM= 00, the next state of the flip-flop is 1. If LM= 01, the next state of the flip-flop is the same as the present state. If LM= 10, the next state of the flip-flop is the complement of the present state. If LM= 11, the next state of the flip-flop is 0. A sequential circuit contains a register of four flip-flops. Initially, a binary number N (0000 ≤ N ≤ 1111) is stored in the flip-flops. After a single clock pulse is applied to the circuit, the register should contain the result of the expression(N−6) mod 16. Design the circuit using the aforementioned LM flip-flops.