Question $4$ options:

Convert each of the following $16-$bit signed hexadecimal numbers to its corresponding decimal number. Do not use any prefix or suffix in your answer. Additionally, please do not use any subscript to specify the base of the number in your answer:

$($a$)$ FF$8716$

Decimal:

$($b$)879616$

Decimal:

$($c$)777716$

Decimal:

$($d$)$ ABCD$16$

Hexadecimal: