For problems $2$ through $6,$ assume all integers are in binary and in two's complement notation.

Remember to indicate overflow if necessary. $[$Each question $2)$ through $6)$ carries $2$ points$]$

$01101010+10011110=?$

$10011111+10010001=?$

$10001111-00010000=?$

$00010010-00101111=$

$11111010-11101110=?$