this is Work study plz help this is my first question

A direct time study was taken on a manual work elements using the snapback method. The regular cycle consisted of elements, a, b, c, and d. Element e = 3.5 min is an irregular element performed every six cycles. Apfd=16% Work element a b C d Observed time (min) 3.4 2.55 -- 3.9 2.95 -- 3.5 Performance rating_110% 95% 100% 85% 100% Determine the standard time for the cycle A 13.15 min B) 13 min C C 15.25 min D 16.07 min A direct time study was taken on a manual work element using the snapback method. Five observations were taken. Apfd = 20% Observation # 1 2 3 4 5 Observed time (min) 3.09, 2.88 -- 3.77 - - 1.98 -- 2.51 Performance rating 90% 80% 110% 95% 85% Determine standard time for the element A) 12.9766 min B) 3.1791 min C) 2.6493 min D 13.2465 min A direct time study was taken on a manual work element using the snapback method. Four observations were taken. Apfd = 15% Observation # 1 2 3 4 Observed time (min) 1.51 2.05 1.59 1.95 Performance rating 85% 110% 120% Determine standard time for the element 95% A) 2.0889 min B) 7.266 min C 1.8165 min D) 10.027 min The snapback timing method was used in a direct time study of task includes a machine cycle. Elements a, b, c, and d are performed by the operator and element m is a machine semiautomatic cycle. Element b is an internal element performed simultaneously with element m. Element d is an irregular element performed every 12 cycles. Apfd = 0.1. Am = 0.15 Work element a b d 0.75 0.55 0.65 Observed time, manual, 0.34 Performance rating 110% Machine element Observed time, machine (idle) 90% 95% 100% m 1.5 (idle) (idle) Work element a b d. 0.75 0.55 0.65 Observed time, manual, 0.34 Performance rating 110% Machine element Observed time, machine (idle) 90% 95% 100% m 1.5 (idle) (idle) A) 2.77 min B 1.045 C 2.45 min D) 1.725 74 minutes remaining ? Save and Close Submit