Q$4$: Answer the following questions.

A$)$ A startup company, $"$My ISA" is assigned the task of developing an ISA for a computer. This

computer is expected to handle fixed length instructions $(4$ Bytes size$).$ It is expected to support two

$-$address instructions and single$-$address instructions. The following are the constraints:

The length of address field$($s$)$ in the instruction should be $12$ bits

Maximum $250$ two$-$address instructions

Answer the following questions:

$($i$)$ How many single$-$address instructions can be supported? $[1$ Mark$]$

$($ii$)$ Provide instruction format for both instruction types. $[0\mathrm{.}5+0\mathrm{.}5$ Mark$]$