A time study was conducted on a task that consists of four elements. The observations and performance ratings for six cycles are shown in the following table. Observations (minutes per cycle) Element Performance Rating 1 2 3 4 5 6 1 2 84% 78 0.49 0.44 0.43 0.44 0.48 0.45 1.44 1.49 1.48 1.46 1.54 1.42 3 135 0.88 0.78 0.84 0.88 0.89 0.79 4 124 1.25 1.30 1.22 1.14 1.14 1.19 a. Calculate the average time for each element. (Round the final answers to 2 decimal places.) Element Performance Rating 1 84% 2 78 3 4 135 124 minutes minutes minutes minutes b. Calculate the normal time for each element. (Round the final answers to 3 decimal places.) Element 1 Performance Rating 84% 2 78 3 135 4 124 NT minutes minutes minutes minutes c. Assuming an allowance factor of 15 percent of workday, calculate the standard time for this task. (Round the final answers to 2 decimal places.) Element Performance Rating 1 84% 2 78 3 135 4 124 ST minutes minutes minutes minutes