1. A manufacturing company conducts a time study of a process with 5 elements and each element has been measured for 10 times. A and E jobs are processing by machines and their allowance rate are 10%. The rest of the jobs are done manually. The performance rate of the operator on these jobs is 85% and the allowance rate is 18%. The average observed time of the jobs are as follows. Observed Element time A 3.61 B 4.48 C 2.93 D 4.91 E 1.78 Determine the standard time for each jobs