can someone please help solve this? thank you

Task time estimates for the modification of an assembly line at Jim Goodale's Carbondale, Illinois, factory are as follows: Immediate Predecessor(s) Time Activity (in hours) A 6.0 B 6.7 50 D 8.0 E 15.1 F 8.1 G 60 A B.C B, C D EF This exercise contains only part a. a) The correct precedence diagram for the project is shown in Figure 3 Figure 2 Figure 1 Figure 1 A E F. D B Figure 2 KA E F B Figure 3 A F E B