a.Compute the six-month moving-average forecast. b.Determine the forecast errors for these periods. c.Compute the MAD,the MSE,and the MAPE based on the forecast errors computed in part(b). 3.(10%)A project consists of seven activities.The precedence relationships are given in the table. Activity Time Immediate (days) Predecessors A 32 B 21 C 30 D 45 A E 26 A,B F 28 C G 20 E,F a.Construct a network for this project(Activity on Are). b.Compute the earliest and the latest starting and finishing times for each activity and identify the critical path. B卷总6页第2页姓名B 卷 总 6 页 第 2 页 姓名 a. Compute the six-month moving-average forecast. b. Determine the forecast errors for these periods. c. Compute the MAD, the MSE, and the MAPE based on the forecast errors computed in part (b). 3. (10%) A project consists of seven activities. The precedence relationships are given in the table. Activity Time (days) Immediate Predecessors A B C D E F G 32 21 30 45 26 28 20 _ _ _A A, B C E, F a. Construct a network for this project (Activity on Arc). b. Compute the earliest and the latest starting and finishing times for each activity and identify the critical path