$(8)(4$ marks$)$ Perform the subtraction on the given signed binary numbers using $2\text{'}$s complement

method. Note that you first need to convert the decimal numbers into the appropriate format.

Assume that we are using an $8-$bit CPU. Represent your final result using the plus or negative

decimal format, whenever it is applicable.

$($a$)(+29{)}_{10}+(-49{)}_{10}$

$($b$)(-29{)}_{10}+(-49{)}_{10}$

$(9)(4$ marks$)$ Given a binary number $10010110$ in an $8-$bit CPU, calculate its original number in

the decimal format, for each of the following formats it is represented in$.$

$($a$)$ Unsigned binary format

$($b$)$ Signed $1\text{'}$s complement format

$($c$)$ Signed $2\text{'}$s complement format

$($d$)$ BCD format