QUESTION 5 Installing a muffler at Barut Garage, Inc. involves a five work tasks. Azra has timed workers performing these tasks seven times with the results (in minutes) shown in the following table. No Tasks 1 2 3 4 5 6 7 PR 1 1 Select correct mufflers 3 6 4 3 4 6 5 90 2 Remove old muffler 7 8 8 6 6 8 6 110 3 Install new muffler 15 15 13 12 15 14 14 110 4 4 3 3 4 3 3 3 110 Inspect the work Complete paperwork 5 9 10 8 7 7 7 9 90 Given that Azra does not want an error of more than 0.06 and a confidence level less than 0.85 answer the following: Provide the z-score: - Round to the nearest hundredth, for example 4.22 Does the number of observations for the following tasks warrant such confidence level? Enter YES or NO. Task # 3 Install new muffler : Task # 5 Complete paperwork: What are the required numbers of observations for these tasks? Enter the number. Task # 3 Install new muffler : Task # 5 Complete paperwork : Assume that the number of observations for the following tasks justifies the confidence level and accuracy mentioned above. Also note that Azra factors in a total of fatigue and personal allowance of 0.05 applied to job time. Provide the following results from your solution: Task Normal Time Standard Time # 2 Remove old muffler min min # 4 Inspect the work min min minutes Provide the total standard time for the whole job: *Round to the nearest hundredth, for example 8.45 minutes