Cool Wave is an SME that makes ice shavings for sale. Recently, Lim commissioned a contractor to build a new warehouse to store ice bags before shipping to customers. The contractor has prepared a table showing the activities involved in building the warehouse, and the amount of time needed to complete them. Activity Duration (Weeks) 3 2 Activity Activity Description Activity Predecessor A Excavate B Erect fence A, B C Erect foundation Erect building Install tank 6 2 Install generator Fix electrical wiring Piping Paint walls Install machinery D D, E E 4. 3 G, H F 5 J 2 (a) (b) (a) Draw the network to show the project management (measured in weeks). Determine the earliest start time (ES), earliest finish time (EF), latest start time (LS), latest finish time (LF) and slack (s) for each activity. Identify the activities that make up the critical path. (c) CDEFGH