4. What instruction is executing as indicated by the highlighted datapath shown in the diagram? PCSrc Add Add ALU result 4 Shift left 2 Read register 1 Read register 2 Write register Write data ALUSrc4 ALU operation Read PC Read data 1 address MemWrite MemtoReg Zero ALU ALU Instruction Instruction memory Registers Read data 2 resultAddress data Write Data data memory 32 MemRead Sign extend 4. What instruction is executing as indicated by the highlighted datapath shown in the diagram? PCSrc Add Add ALU result 4 Shift left 2 Read register 1 Read register 2 Write register Write data ALUSrc4 ALU operation Read PC Read data 1 address MemWrite MemtoReg Zero ALU ALU Instruction Instruction memory Registers Read data 2 resultAddress data Write Data data memory 32 MemRead Sign extend