3. We would like to have an instruction that does nothing. Many ISA's actually have an opcode devoted to doing nothing. It is usually called NOP, for NO OPERATION. The instruction is fetched, decoded and Executed. The execution phase is to do nothing. Which of the following three instructions could be used for NOP and have the program still work correctly. (1) 0001 001 001 1 00000 (2)0000 111 000000001 (3)0000 111 000000000 3. We would like to have an instruction that does nothing. Many ISA's actually have an opcode devoted to doing nothing. It is usually called NOP, for NO OPERATION. The instruction is fetched, decoded and Executed. The execution phase is to do nothing. Which of the following three instructions could be used for NOP and have the program still work correctly. (1) 0001 001 001 1 00000 (2)0000 111 000000001 (3)0000 111 000000000