The probability is 0.45that a traffic fatality involves an intoxicated driver. In tentraffic fatalities, find the probability that the number, X, which involve an intoxicated driver isa. exactly three; at least three; at most three.b. between twoand four,inclusive.c. Find the mean of the random variable X.d. Find the standard deviation of the random variable X.

a. The probability that exactly three traffic fatalities involve an intoxicated driver is __.(Round to four decimal places as needed.)

The probability that at least three traffic fatalities involve an intoxicated driver is __.(Round to four decimal places as needed.)

The probability that at most three traffic fatalities involve an intoxicated driver is __.(Round to four decimal places as needed.)

b. The probability that between twoand fourtraffic fatalities, inclusive, involve an intoxicated driver is __(Round to four decimal places as needed.)

c. The mean of X is __.

d. The standard deviation of X is __. (Round to two decimal places as needed.)