An integer $k$ is represented with a $16-$bit two's complement value. Suppose this needs to be changed to a $20-$ bit value. Using sign extension, show how each of the values can be represented in $20$ bits. Give your answer in hexadecimal without prefix $($i$.$e$.$ do not include a leading $0x$ or x $)$ and without sapces $($just the hexadecimal digits$).$

The $20-$bit sign extension of CAFE is $$

A

The $20-$bit sign extension of $3670$ is $$

A