HWr$-$Pant

$]$ as a binsry number using $4$ bits.

Expess $(-4)$ lit as a binary number ukeng sprect magnitude.

Fxpese $1-4$ lso as a hinary number uking $\text{'}2\text{'}$s complement

Add the first $2$ numbers.

Add the $1m$ and $3^E$ numbers:

Add colt if needed for Luniflaw or isniore owetflow findicate $($gnaned tyerfiom$)$ That vouhne