$1.(20$ points$)$ Perform the following binary arithmetic operations without using complement $($show your works$).$

$($a$)110101+10110$

$($b$)11010110110$

$$

$2.(30$ points$)$ Perform the following binary arithmetic operations using complement $($show your works$).$

$($a$)11010110110$

$($b$)10110110101$

$$

$3.(50$ points$)$ Perform the following arithmetic operations using signed $2$s complement binary numbers.

$($a$)19+12$

$($b$)1912$

$($c$)1219$

$($d$)1912$