3. Consider Figure 1, Network Diagram. All duration estimates or estimated times are in days. Start A 15 D 9 G 8 B 17 12 H E 9 14 F 11 11 End The above network diagram has five paths; the paths and their duration Path 1: Start -> A -> B -> C-> End, duration: 46 days. Path 2: Start >D -> E ->F -> End, duration: 32 days. Path 3: Start -> D -> B -> C > End, duration: 40 days. Path 4: Start -> G ->H ->I -> End, duration: 28 days. Path 5: Start -> G -> E ->F -> End, duration: 31 days. a) Determine the critical path for this project. b) Calculate the total float for Path 4. c) Calculate the Early Start (ES) and Early Finish (EF) of Activity C. d) Calculate the Late Start (LS) of Activity E.