Question: 20. If there are 5 activities A, B, C, D, E such that A, B, C have no immediate predecesors but D and E have

20. If there are 5 activities A, B, C, D, E such

20. If there are 5 activities A, B, C, D, E such that A, B, C have no immediate predecesors but D and E have predecesors. A, B and B, C respectively. Represent th activities by means of net work dia- gram. 081 21. Draw a net work for the project whose activitis and their precedence relationships are given below. Activity B C D E F Predecessor A,B AC B,C

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