Perform the following in the $2\text{'}$s Complement system. Use $8-$bits $($including signed bit$)$ for each number. Check result by converting back to decimal.

SHOW WORKING, CREDIT WILL NOT BE GIVEN IF THERE IS NO WORKING.

Add $+9$ and $+6($example of showing working$)$

$00001001=+9=+6$

$00000110=+15$

$000011111=$

Add $+14$ to $-17($example of showing working$)$

Add $+19$ to $-24$

$00011000+11100111+15=11101000$

Add $-48$ to $-{800}^{\text{'}}\frac{0101}{5}=000001012=510,$ answer $=-5$

Subtract $+16$ from $+17$

Subtract $+21$ from $-13$