A professor is planning an informal gathering of his closest friends. The activities for the project are as follows: The early start time for the Hire valets activity? What is the late start time for the Stock wine cellar activity? What is the slack time for the Stock wine cellar activity? Determine the estimated completion time of the project Determine a critical path Activity Time Predecessor A. Call planner 12 - B. Book caterer 10 - C. Hire quartet 9 A D. Schedule cleaning crew 15 A E. Stock wine cellar 7 B F. Hire valets 8 D, E G. Schedule butler overtime 13 C, F