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 88% 0.42 0.45 0.42 0.50 0.50 0.41 2 74 1.43 1.52 1.46 1.40 1.46 1.47 3 116 0.84 0.87 0.82 0.76 0.87 0.89 4 104 1.25 1.23 1.23 1.29 1.30 1.23 a. Calculate the average time for each element. (Round the final answers to 2 decimal places.) Element Performance Rating OT 1 88% minutes 2 74 minutes 3 116 minutes 4 104 minutes b. Calculate the normal time for each element. (Round the final answers to 3 decimal places.) Element Performance Rating NT 1 88% minutes 2 74 minutes 3 116 minutes 4 104 minutes c. Assuming an allowance factor of 12 percent of workday, calculate the standard time for this task. (Round the final answers to 2 decimal places.) Element Performance Rating ST 1 88% minutes 2 74 minutes 3 116 minutes 4 104 minutes