Problem 6. Design a circuit that has a 4-bit input A = azazazaj, a 1-bit input M, and a 4-bit output Y=y4Y3y2y1. When M = 0, the input is simply copied to the output (so y4= 24, Y;= az, y = a,, and y,=a), and when M= 1, the order of the input bits is reversed so that y=a,, Y;= a, Yz= az, y = 24. Use any parts we have discussed in class (AND, OR, NOT, NAND, NOR, XOR, XNOR, adder, adder/subtractor, decoders, priority encoders, and multiplexers)