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.

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 1 2 Tasks Select correct mufflers Remove old muffler Install new muffler 2 8 15 8 13 4 3 4 5 6 7 PR 6 3 4 5 5 120 8 6 8 7 6 85 14 12 15 13 85 3 3 3 3 3 3 110 98 101 10110 Inspect the work Complete paperwork Given that Azra does not want an error of more than 0.07 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 0.15 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