1. In an attempt to decrease drunk driving , police set up vehicle checkpoints during July 4 evening. The police randomly select vehicles to be stopped for "informational " checks. On a particular roadway, assume that 20%% of all drivers have a blood alcohol level above the legal limit. For a random sample of 15 vehicles, compute the following probabilities : a. All 15 drivers will have a blood alcohol level exceeding the legal limit (1 point). b. Exactly 6 of the 15 drivers will exceed the legal limit (1 point). c. Of the 15 drivers, 6 or more will exceed the legal limit (1 point). d. All 15 drivers will have a blood alcohol level within the legal limit (1 point). 2. If the annual precipitation X in a city is a normal variate with a mean of 50 in, and a coefficient of variation (CoV) of 0.2, determine the following : a The standard deviation of X (1 point). b. P(X 60) (1 point ). 1. P(40