Problem: Braking distance

$($a$)$ If a car that is travelling with velocity $28\mathrm{.}0$ m$/$s in the $+$x direction brakes with acceleration $10\mathrm{.}0$ m$/$s$,$

how far does the car travel between starting to brake and stopping?

$($b$)$ If a car that is travelling with velocity v$0$ in the $+$x direction brakes with acceleration $$abrake$,$ how

far does the car travel between starting to brake and stopping?

$($c$)$ If car A is initially travelling twice as fast as car B and both brake with the same deceleration, how

many times farther is car A$$s braking distance than car B$$s