16. (30 Points) Suppose the following instructions are found at the given locations in memory 20 LDA 50 21 ADD 51 50 724 51 006 550 151 Show the contents of IR, PC, MAR, MDR, and A at the conelusion of instruction 20. The register transfer language sequence has been included to help you sequence the events. PC-MAR final value of IR - final value of MAR- final value of MDR and A- final value of PC= MDR IR IR [address] MAR MDR A PC +1-> PC MAR MDR PC