7. The continuous timing method in direct time study was used to obtain the times for a worker-machine task as indicated in the table below. Element c is a machine-controlled element and the time is constant. Elements a, b, d, e, and f are operator-controlled and were performance rated at 95%; they are all external elements performed in sequence with machine element c. The machine allowance is 30%, and the PFD allowance is 15%. Determine (a) the normal time and (b) standard time for the cycle. (c) If the operator works at 100% of standard performance in production and one part is produced each cycle, how many parts are produced if the total time worked during an 8-hour day is 7.25 hours? (d) For the number of parts computed in (C), what is the worker's efficiency for this shift? Element a b d e f Observed time (min) 0.22 0.40 1.08 1.29 1.75 2.10