1/The Economistcollects data each year on the price of a Big Mac in various countries around the world. The price of a Big Mac for a sample of 12 McDonald's restaurants in certain geographic region in July 2016 resulted with averageprice x = 8.4$. Assume that the population standard deviation price =1.7$ and it follows a normal distribution. Construct and interpret 99% confidence interval for the average price of Big Mac around the world.

2/A report of Frontier Airlines conducted a study to estimate average passenger plus carry-on weights. They found an average summer weight x =183 pounds. Suppose that the estimate was based on a random sample of 26 passengers and that the sample standard deviation s = 20 pounds for summer weights. Construct and interpret 95% confidence interval for the mean summer weight of Frontier Airlines passengers.