Need help to solve 7.1 as CPM chart

Review Questions and Exercises 125 REVIEW QUESTIONS AND EXERCISES 7.1 Develop the precedence diagram network for the following project and then calculate the total float, free float, and interfering Must Follow float for each activity. Label Duration Operations A Immediately Following G Activity Duration Activities 22 aj 10 C.G 13 dj TH 8 FJ.K " WOO DOZENASE 15 cfg D,K 17 hik E,K 15 hik MN 6 dj N,O 11 L,O,P 12 OR 20 7.3 From the following network data, determine the critical path, starting and finishing times, and total and free floats. 7.2 Make a clear and neat sketch of the network specified below using precedence notation. Activity Description Duration On the precedence diagram calculate and show the early start (EST), early finish (EFT), late start (LST), late finish (LFT), and 1-2 Excavate stage 1 total free and interfering float in each activity using the nota- 1-8 Order and deliver steelwork tion shown below. Start calculations with day zero 0. Show the 2-3 Formwork stage 1 critical paths with colored pencil. 2-4 Excavate stage 2 3-4 Dummy 3-5 Concrete stage 1 4-6 Formwork stage 2 5-6 Dummy WOOOO WONO OUI AN 5-9 Backfill stage 1 6-7 Concrete stage 2 7-8 Dummy EST EFT 7-9 Dummy 3-10 Erect steel work Label 9-10 Backfill stage 2 Duration Draw the network in precedence notation. LST LFT 7.4 Using the information given in figures shown, develop a precedence notation CPM net-work for the bridge project The activity logic and durations are as follows