initial speed of the racer is given as


after applied force the final speed is given as


now during this speed change the racer will cover total distance 185 m
so here we will use kinematics



now the force that chute will exert on the racer will be given as



B) here following is the strategy for solving it
1. first we used kinematics to find the acceleration of the car
2. then we used Newton's II law (F = ma) to find the force