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1) Consider a particular type of car engine, which has an average gas mile-age of 35 miles per gallon and a standard deviation of 5 miles per gallon

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1) Consider a particular type of car engine, which has an average gas mile-age of 35 miles per gallon and a standard deviation of 5 miles per gallon. Calculate the 95th percentile of the gas mileage and interpret the result.

2) Suppose the waiting time for a bus in a particular bus routine follows a uniform random variable between 0 and 10 minutes. Calculate the 80th percentile for the waiting time.

3) Assume that the lifetime of a car engine follows an exponential distribution with an average of 10 years.    (a). Calculate the median lifetime of the car engine.    (b). What is the 90th percentile of the car engine and interpret the result?