9. A survey asked people, “How many hoursdo you spend watching reality TV shows perweek?”. The following summary was obtained from a random sample of 1200 people:x = 10.5, s = 3.1 hours. Construct a 90% confidence interval for population mean.A. (5.4,16.6)B. (7.4,13.6)C. (10.35, 10.65)D. (10.32, 10.68)E. Cannot compute  b) (In the context of the above problem) what isthe minimum required sample size to makesure that the margin of error is 0.5 at 90%level of confidence when the population standard deviation is known to be 2.5 hours?A. 5B. 9C. 68D. 97E. 105

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