Given the following information, compute the early, late, and slack times for the project network. ID Task Duration Predecessor Additional Lag Relationships Lag A B Post Signs Prepare Site 5 A Finish-start A to B 10 Lights 5 B D Dig Trenches E Lay Pipe 4 D Start-start D to E 3 Back Fill 2 E Start-start E to F 1 G Pave 1 F H Paint Parking Lines 3 G Finish-start G to H 2 I Signage 2 G Open Lot 2 C, H, I D Tat A S " Prepare C Upt 0 DET I Lay Poe ' Sail 0 H Part.Porgies 1 Srage What is the ES for Activity E? What is the LF for Activity F? What is the slack for the start of Activity C? What is the slack for the start of Activity I? What is the slack for the end of Activity 1? What is the length of the project? time periods.