Please, can you provide detailed explanation of the task and proper solution with all steps

d) Pr(a & b)/Pr(a). e) Pr(alb)/Pr(a). In a large metropolitan area, one out of ten drivers on the road on Saturday after midnight is intoxicated. Half of all a) 1/10. accidents during this time period involve drunk drivers. Finally, the overall accident rate Saturday after midnight is 3 accidents per 100 cars on the road. For a drunk driver, the risk of accident is b) 1/2. C) 3/100. Tuttoxicated. 15/100. e) 30/100 15. The test result B has no value in predicting outcome A if