Question $3$

$3$ OF $4$ QUESTIONS REMAININ

Suppose that the following instructions are found at the given locations in memory:

$20$ LDA $50$

$21$ ADD $51$

$50724$

$51006$

a$.$ show the contents of the IR$,$ the PC$,$ and the MAR, the MDR$,$ and A at the conclusion of instruction $20.$

b$.$ show the contents of each register as each setup of the fetch$-$execute cycle is performed for instruction $21.$Please help