Convert A $=7710$ into an $8-$bit number. Show your step.

$(6$b$)$Convert B $=10210$ into an $8-$bit number, and $$B into $2\text{'}$s complement of B$.$ Show your step.

$(6$c$)$Compute the difference C $=$ A $$ B using method of $2\text{'}$s complement, that is$,$ obtain C without doing bit$-$wise subtraction.

Show your step.

$(6$d$)$Perform the addition of D $=$ A $+$ B$,$ and argue if the result is correct