$2\mathrm{.}2$ Convert the following unsigned binary numbers to decimal, octal, and hexadecimal numbers. a$)11110$b$)11010$c$)100100011$d$)1011011$

$2\mathrm{.}4$ Convert the following numbers to $12-$bit signed binary numbers using two's complement representation.a$)234($base $10)$b$)-234($base $10)2\mathrm{.}7$ Perform the following $8-$bit signed binary calculations $,$ and specify the resulting decimal number. a$)10101010+00111011$b$)00111101+01110100$c$)11100011+11110011$d$)11000111+10010110$