$8.$ Perform the following operation, and report the answer as $12$ bit two$$s complement binary and hexadecimal:

$101011010011$

$110110100101$

$$

$2$

$9.$ Perform the following operation, and report the answer as $12$ bit binary and octal:

$01001$

$\backslash$times $01011$

$$

Be careful with your answer.