How would you build a Gnatt chart based on this information

Table 1 Ventura Baseball Stadium Case

ID Activity Duration Predecessor(s) 1 Baseball Stadium 2 Clear stadium site 60 days - 3 Demolish building 30 days 2 4 Set up construction site 30 days 2 5 Drive support piling 120 days 2 6 Pour lower concrete bowl 120 days 5 7 Pour main concourse 120 days 4,6 8 Install playing field 90 days 4,6 9 Construct upper steel bowl 120 days 4,6 10 Install seats 140 days 7.9 11 Build luxury boxes 90 days 7.9 12 Install jumbotron 30 days 7.9 13 Stadium infrastructure 120 days 7.9 14 Construct steel canopy 75 days 10 15 Light installation 30 days 14 16 Build roof supports 90 days 6 17 Construct roof 180 days 16 18 Install roof tracks 90 days 16 19 Install roof 90 days 17, 18 20 Inspection 20 days 8 11, 13,15, 19