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	3	5	4	4	5	5	6	110
2	Remove old muffler	7	7	7	5	8	6	5	120
3	Install new muffler	14	13	11	14	15	12	13	90
4	Inspect the work	4	4	3	4	3	3	4	110
5	Complete paperwork	7	10	7	10	8	10	9	120

Given that Azra does not want an error of more than 0.03 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 : 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 0.10 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

Provide the total standard time* for the whole job: _____ minutes. *Round to the nearest hundredth, for example 8.45 minutes