Please help solving question 1 and question 2.If it is possible, please give me a detailed explanation! Thank you so much!

Question 1 After a number of complaints about its directory assistance, a telephone company examined samples of calls to determine the frequency of wrong numbers given to callers. Each sample consisted of 100 calls. SAMPLE 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 11 13 14 SAMPLE 9 10 of errors 5:3 12 5 15 16 07 a. Set the control limits to include 95% of random variation in complaint rate. b. Plot the values of the sample statistic on a chart. Comment on the results. c. Discuss THREE major management decisions related to the use of the control charts. Question 2 An appliance manufacturer in Australia wants to contract with a repair shop to handle authorized repairs in Bangkok. The company has set an acceptable range of repair time from 50 minutes to 90 minutes. Two firms have submitted bids for the work. In test trials, Firm A had a mean repair time of 76 minutes with a standard deviation of 4.0 minutes. Firm B had a mean repair time of 72 minutes with a standard deviation of 6.0 minutes. Which firm would you choose? Explain your answer. Question 3