Conversion to Computer World and $2$s Complement Addition $[35\%]$

Assume a $24-$bit word on a computer. In these $24$ bits, we wish to represent the data $456$ and $456.$

$($a$)[5\%]$ How would the computer represent the unsigned decimal value $456$ in a word?

$($b$)[5\%]$ Assuming two$$s complement representation is used, how would the computer represent the signed decimal value $456$ in a word?

$($c$)[5\%]$ How would the computer represent $456$ and $456$ in signed magnitude form?

$($d$)[5\%]$ If our computer uses $8-$bit ASCII, how would the computer represent the string $456$ in a word?

$($e$)[5\%]$ Is it possible to represent the string $456$ in a word of this computer? Why or why not?

$($f$)[5\%]$ Perform the following operations using two$$s complement arithmetic: $($i$)456+(124),($ii$)456+(4).$ Indicate if overflow occurs in the addition. Show your steps.

$($g$)[5\%]$ Perform the following operations using signed$-$magnitude arithmetic: $($i$)456+(124),($ii$)456+(4).$ Indicate if overflow occurs in the addition. Show your steps.