April 18, 2018 Q5.a. (9 points) We would like to have an instruction that does nothing. Many ISAs 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? a. 0001 001 001 1 00000 b. 0000 111 000 0 00001 c. 0000 000 000 0 00000 D. (6 points) How many times does the LC-3 make a Read Request and Write Request to the memory during the processing of a STI instruction ?.(Do not include Instruction Fetch) Number of Write RequestsBecause Number of Read requests Because E (SPOINTS) Identify an LC-3 instruction which does not change the contents of the the space below. memory, and the condition codes. Fill in the machine code for the identified in