The estimated daily living costs for an executive traveling to various major cities follow. The estimates include a single room at a four-star hotel, beverages, breakfast, taxi fares, and incidental costs. Click on the datafile logo to reference the data. City Daily Living Cost ($) City Daily Living Cost ($)Bangkok 242.87 Mexico City 212Bogotaˊ 260.93 Milan 284.08Cairo 194.19 Mumbai 139.16Dublin 260.76 Paris 436.72Frankfurt 355.36 Rio de Janeiro 240.87Hong Kong 346.32 Seoul 310.41Johannesburg 165.37 Tel Aviv 223.73Lima 250.08 Toronto 181.25London 326.76 Warsaw 238.2Madrid 283.56 Washington, D. C. 250.61a. Compute the sample mean. b. Compute the sample standard deviation. c. Compute a 95% confidence interval for the population standard deviation.