A four-bit barrel shifter is a combinational circuit with four data inputs, two control inputs, and two data outputs. It allows the data inputs to be shifted onto the outputs by 0, 1, 2, or 3 bit positions, with the rightmost bits wrapping around (rotating) to the leftmost bits. For example, if the data inputs are 1100 and the control input specifies a two-bit shift, then the output would be 0011. If the data input is 1110, a two-bit rotation produces 1011. Design a four-bit shift register using a barrel shifter that can shift to the right by 0, 1, 2, or 3 positions.