Problem 10.28 Questior Based on a careful work study in the Hofstetter Corp., the results shown in the following table have been observed: Performance Rating 115% 1 5 Element Prepare daily reports Photocopy results Label and package reports Distribute reports 35 11 2 16 Observation (minutes per cycle) 2 3 4 41 32 41 11 37 14 3 4 5 18 22 16 115% 40 13 5 45 90 % 90% * Photocopying machine broken; included as delay in the allowance factor Power outage; included as delay in the allowance factor The allowance factor for this type of work is given to be 12% (Round all intermediate calculations to two decimal places before proceeding with further calculations.) a) The normal time for the "prepare daily reports" operation = 43.47 minutes (round your response to two decimal places). The normal time for the "photocopy results" operation = 14.08 minutes (round your response to two decimal places). The normal time for the "label and package reports" operation = 3.42 minutes (round your response to two decimal places). The normal time for the "distribute reports" operation = 16.2 minutes (round your response to two decimal places). The normal time for the overall process = 77.17 minutes (round your response to two decimal places). b) The standard time for this process = 87.69 minutes (round your response to two decimal places) c) The number of observations that are required for a 95% confidence level within 5% accuracy - (round your response to the immediate higher whole number)