Question 3: Based on a careful work study in a store, the results shown in the following table have been observed Element Prepare daily reports Photocopy results Label and package reports Distributes reports 1 35 12 3 15 Observations (Minutes) 2 3 4 40 33 42 10 36" 15 3 5 5 18 21 17 5 39 13 4 455 Performance Rating (%) 120 110 90 85 # Photocopying machine broken $ Power outage (a) Compute the normal time for each work element. [2 Marks] (b) If the allowance for this type of work is 15%, what is the standard time? [1 Marks (c) How many observations are needed for a 95% confidence level within 5% accuracy? [2 Marks]