Urgent!

A project to remodel a bathroom has the following activities. Build in Excel showing prdecessors (20 points).
Activity   Duration   Predecessors
A          2 months---
B         4 months---
C          4 months---
D         1 month               A
E          5 months             B
F         2 months            B, C
G        1 month                C

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H        3 months          E, F, G
I         2 months            D, E
J         2 months            G, H

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