A computer system has a $16-$bit address bus and can address an $8-$bit wide memory. The

memory of this computer system contains $8$ Kbytes of ROM, $32$ Kbytes of user RAM and $8$

Kbytes of video RAM. The ROM, user RAM and video RAM form a contiguous block of

memory starting at address $0.$ The rest of the address range is not used. Explain how data is

represented, structured, and stored by answering the following questions.

$($A$)$ Draw a memory map for the computer system. Indicate the starting and ending

addresses in hexadecimal for each block of memory and any unused space. Show your

working.

$($B$)$ What is the unused memory capacity for this computer system? Express your answer

in Kbytes. Show your working.