Q$1.$ Given $A=12\mathrm{.}52$ and $B=22\mathrm{.}24($letters $M$ and $N$ represent $7^{th}$ and $8^{th}$ digit of your student ID number, respectively$),$

$($a$)$ Use binary to convert between octal and hexadecimal: convert hexadecimal numbers $($A$)$