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	5	5	6	6	4	4	5	120
2	Remove old muffler	5	7	6	6	8	5	6	90
3	Install new muffler	14	13	12	13	11	13	11	85
4	Inspect the work	4	4	3	3	3	3	3	100
5	Complete paperwork	9	9	7	7	7	10	8	100

Given that Azra does not want an error of more than 0.03 and a confidence level less than 0.95 answer the following: Provide the z-score: [a] 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 : [b] Task # 5 Complete paperwork : [c] What are the required numbers of observations for these tasks? Enter the number. Task # 3 Install new muffler : [d] Task # 5 Complete paperwork : [e] 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 0.20 applied to job time. Provide the following results from your solution:

Task	Normal Time*	Standard Time*
# 2 Remove old muffler	[f] min	[g] min
# 4 Inspect the work	[h] min	[i] min

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