Having trouble calculating this problem :According to a report in U.S. News from April 2013, the average price of gasoline at all U.S. gas stations was $3.00 (). The population standard deviation () of gas prices is $1.75.LetXbe a random variable denoting gas price at gas stations.We plan to take a random sample of 36 gas stations.

What is the probability that a random sample of 36 gas stations will provide an average gas price (Xbar) that is more than $3.50?