The average price for a gallon of gasoline in the United States is $3.73 and in Russia it is $3.40. Assume these averages are the population means in the two countries and that the standard deviation of $.25 in the United States and a standard deviation of $.20 in Russia. What is the probability that a randomly selected gas station in the United States charges less than $3.50 per gallon? What percentage of the gas stations in Russia charge less than $3.50 per gallon? What is the probability that a randomly selected gas station in Russia charged more than the mean price in the United States?