Question: 2. (10 Points) Construction schedule 1 A project has A, B, C, D, E, F, and their logical relationship, working time and preferred coefficient are

2. (10 Points) Construction schedule 1 A project

2. (10 Points) Construction schedule 1 A project has A, B, C, D, E, F, and their logical relationship, working time and preferred coefficient are shown in the following table. D E B 8 10 Work name A B F Tight before work A. B C. D. E Normal duration 10 7. 15 15 Please answer the following questions: (1) Draw a double symbol network diagram; (4 Points) (2) Calculate the corresponding earliest start time, the earliest end time, the latest start time and the latest end time of each A and D work, and calculate the computational time limit of the project: (3 Points) (3) Determine the key work and key lines of the project. (3 Points) Solution

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