The problem is in MIPS assembly. Please don't answer a BS answer if you don't know it.

Add ALU Add result 4 Shift left 2 RegDst Branch MemRead MemtoR instruction 131-26 Control ALUSrcI RegWrite Instruction 25- Read PCRead register 1 Read address Instruction [20-16] ead data1 Zero register 2 Write Read Instruction ALU Read Address data [31-0] result InstructionInstruction (151register data2 memory Write data Registers Write Data data memo Instruction [15-0] 16 Sign 32 ALU control extend Instruction [5-0 Figure 1 The simple datapath with the control unit