Design a 4-bit register with both shift and parallel load features. The inputs of the register include a 2-bit control code X Y, a 4-bit input value I3 I2 I1 I0, and a clock signal. The outputs of the register are the 4 bits Q0 Q1 Q2 Q3 corresponding to the value stored in the register. You are allowed to use any number of D flip-flops, muxes of any size, decoders and encoders of any sizes, AND gates, OR gates, and NOR gates. (Notes