04. A new mail order house is setting up in PEL and is working to a plece mail system for its workers. The following is the observations from the time study for 7 ydes of the five-element job and the performance rating for each element are as follows All calculation can be rounded to four decimals) Time in seconds to stuff material in each envelope there are five stuffing's for each envelope that make up the five elements. Element Sumt RF 12. 11.15 23.820.85 3 1 .03 0.90 4.51 1.00 5 4.5 0.80 a. Determine from the above using an allowance factor of 15% compute the standard time for this job. b. If the company pays the workers piece meal for the job at a rate of 7.5 cents per envelope what is the average workers hourly rate. What is the subject workers hourly rate. c. Using s.597 determine the number of cycles for this study such that the company would be 90% confident that the average time from the study would be + or -3% of the true average cycle time. d. Management has indicated they want to have a 95% confidence level with an error tha is + or - 20 of a minute. The standard deviation is the same as in (c) above. How man cycles should be completed