second group
first question
Velocity (Initial): ?
Velocity (Final): ?
Distance: -54.7m
Time: 4s
Acceleration: -9.8m/s^2
use this equation to find the initial velocity
d=.5*a*t^2 + V(i)*t
then use this equation to find the final velocity
Vf=a*t + Vi
that is it & good luck