4.4 When silicon chips are fabricated, defects in materials (e.g., silicon) and manufacturing errors can result in defective circuits. A very common defect is for one signal wire to get broken and always register a logical 0. This is often called a stuck-at-0 fault. 4.4.1 [5] <4.4> Which instructions fail to operate correctly if the MemToReg wire is stuck at 0? 4.4.2 [5] <4.4> Which instructions fail to operate correctly if the ALUSrc wire is stuck at 0? 4.4.3 [5] <4.4> Which instructions fail to operate correctly if the Reg2Loc wire is stuck at 0?