The cost of unleaded gasoline in the Bay Area once followed an unknown distribution with a mean of $4.59 and a standard

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The cost of unleaded gasoline in the Bay Area once followed anunknown distribution with a mean of $4.59 and a standard deviationof $0.90. Sixteen gas stations from the Bay Area are randomlychosen. We are interested in the average cost of gasoline for the16 gas stations.
What the mean for this problem?
What is the standard deviation you will use for this problemwhen looking at the average of the sixteen gas stations? Round tothree decimal places.
What is the probability that 16 stations will have an averageprice less than $4.60? Round to four decimal places.