ALU Control Block Design: The ALU control block takes 2 inputs The operand field from the instruction (bits 31 down to 21 of the instruction). ALUOp (2 bits) from the main control unit The output of the ALU control unit is a 4-bit signal, which directly controls the ALU. Give the ALUCtrl values for the following operations: ALU Function ALUCtrl bits AND OR add subtract pass input b shift left shift right Note: For Shift operations (shift left and shift right), you may used any unassigned value. For the purposes of this lab, use 0011 for shift right, and 0100 for shift left. Write the answer in the form of four binary digits (eg. 0010).