You have been hired as an expert witness in a court case involving an automobile accident. The accident involved car A of mass 1500 kg which crashed into stationary car B of mass 1100 kg . The driver of car A applied his brakes 15 m before he skidded and crashed into car B. After the collision, car A slid 18 m while car B slid 30 m . The coefficient of kinetic friction between the locked wheels and the road was measured to be 0.60. Reconstruct the accident by calculating all the relevant velocities.

a. The speed of car A just before the brakes were applied.
b. The speed of car A just before the collision.
c. The speed of car A just after the collision.
d. The speed of car B just after the collision.