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 Select correct mufflers 4 3 5 5 7 4 3 100 2 Remove old muffler 8 7 7 8 7 6 7 90 3 Install new muffler 11 12 13 14 12 12 12 85 4 Inspect the work 3 4 3 3 4 4 4 110 5 Complete paperwork 8 8 9 10 10 9 10 100 Given that Azra does not want an error of more than 0.06 and a confidence level less than 0.90 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