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The mean preparation fee H&R Block charged retail customers in 2012 was $183 (The Wall Street Journal, March 7, 2012). Use this price as the population mean and assume the population standard deviation of preparation fees is $50, Use 7-table. Round your answers to four decimal places a. What is the probability that the mean price for a sample of 30 H&R Block retall customers is within 88 of the population mean? b. What is the probability that the mean price for a sample of 50 HAR Block retail customers is within $8 of the population mean? c. What is the probability that the mean price for a sample of 100 H&R Block retail customers is within $5 of the population mean? d. Which If any of the sample sizes in parts (a), (b), and (c) would you recommend to have at least a 95 probability that the sample mean is within 38 of the population mean? - Select your answer