Given instructions ADD, JMP$,$ LEA, and NOT, identify whether the

instructions are operate instructions, data movement instructions, or

control instructions. For each instruction, list the addressing modes that

can be used with the instruction.

$5\mathrm{.}2$ A memory$$s addressability is $64$ bits. What does that tell you about the

size of the MAR and MDR$?$

$5\mathrm{.}3$ There are two common ways to terminate a loop. One way uses a counter

to keep track of the number of iterations. The other way uses an element

called a $.$ What is the distinguishing characteristic of this element?