$9-)($LO:$3,4$: PC:$1,2,3,4,5,6,7,9,11,14,18,20)$Ability to add and subtract n$-$bit parade$-$size for $2$ numbers in a computer and what is needed to multiply

i$.$ What are the hardware elements? Please detail the number of basic elements used$).$

ii$.$ If the clock frequency is $100$hz$,$ what do you think about the end times of both islams $($circuit producing correct responses$)?$