5.70 Collecting data on traffic accident fatalities, the National Highway Traffic Safety Administration has found that 58.7% of the victims have 0.0% blood alcohol content (BAC), 5.8% of the victims have from 0.01 to 0.07% BAC, and 35.5% of the victims have at least 0.08% BAC. For a randomly selected victim: Source:

Statistical Abstract of the United States 2009, p. 681.

a. What is the probability that the victim’s BAC was at least 0.01%?

b. Given that the victim had been drinking prior to the accident, what is the probability that this victim’s BAC was at least 0.08%?