The organizer of a rock concert that will take place in Istanbul need to complete the tasks listed in the following table. For this list of tasks, (a) Draw the activity-on-node network. (b) Calculate the total float for each activity. (c) Find the critical path. (d) When should the organizer start working on these tasks if the concert is scheduled to take place on August 13? Activity A B C D E F G H I J Description Find site Find engineers Hire opening act Set radio & TV ads Set up ticket agents. Prepare electronics Print advertising Set up transportation Rehearsals Last-minute details Predecessors A A C A B C C F.H T Duration 3 days 2 days 6 days 2 days 3 days 3 days 5 days 1 day 2 days 2 days