all questions please

Problem 4-15 For the network shown: D(9) B(B) A(z) E(5) G(4) C(7) F(4) 2-1. Determine the critical path. O A-B-D-G O A-C-F-G O A-C-E-G O A-B-E-G -2. Determine the early completion time in weeks for the project. Early completion time Cweeks For the data shown, reduce the project completion time by three weeks. Assume a linear cost per week shortened NORMAL NORMAL CRASH CRASH ACTIVITY TIME COST TIME COST A 7 $ 7.900 4 $13,000 B 8 12.800 6 18 900 C 7 5.200 5 7.200 D 9 4.700 5,700 E 3.800 4 6.100 4 6,400 3 8.600 4 7.900 3 8.000 a-1. Determine the critical path. O A-B-D-G O A-C-F-G OA-C-E-G A-B-E-G a-2. Determine the early completion time in weeks for the project. Early completion time weeks For the data shown, reduce the project completion time by three weeks. Assume a linear cost per week shortened. NORMAL NORMAL CRASH CRASH ACTIVITY TIME COST TIME COST A 7 $ 7,900 4 $13,000 B 8 12,800 6 18.900 7 5,200 5 7,200 9 4.700 5,700 5 3,800 4 6,100 4 6,400 8.600 G 4 7.900 3 8.000 OWL LO 00 om b-1. Which activities in order of reduction would be shortened? OD-B-C O G-E-A O G-D-A OB-G-D b-2. Find the resulting cost to crash. Resulting cost