A car travels on a straight,level road.(a) starting from rest,the car is going 44ft/s at the end of 5.0 s.what is the car's average acceleration in ft/s2? (b) in 4.0 seconds, the car is going 88ft/s.what is the car's average acceleration for this time? (c)the car then slows to 66ft/s in 3.0 s. What is the average acceleration for this time? (d) what is the overall average acceleration for the total time?