ABC Auto Insurance classifies drivers as good, medium, or poor risks. Drivers who apply to them for insurance fall into these three groups in the proportions 30%, 50%, and 20%, respectively. The probability a “good” driver will have an accident is 0.01, the probability a “medium” risk driver will have an accident is 0.03, and the probability a “poor” driver will have an accident is 0.10. The company sells Mr. Brophy an insurance policy and he has an accident. What is the probability Mr. Brophy is: a good driver, a medium driver and a poor driver?