IB Physics-Topic 2 Mechanics Qc#1- A car accelerated uniformly in two stages

In 1997 a high-speed car of mass achieved the world land speed
record. The car accelerated uniformly in two stages as shown in the table. The car started from rest.
Use the data to calculate the:
a. the average acceleration of the car in stage 1.
b. average net force required to accelerate the car in stage 2.
c. total distance travelled by the car in 12 s.