You have collected the data for a time-cost CPM scheduling model analysis. The time is in days and the project "direct costs" are given here. Immediate Predecessor Activity A Normal Time 3 3 Crash Time 2 None A 3 A 1 A 0 A 6610 Normal Cost (Direct) $300 $100 $200 $400 $500 $200 $100 B and C Crash Cost (Direct) $400 $100 $200 $550 $900 $200 $100 NWP NW D NW PN E F The indirect costs for the project are determined on a daily duration basis. If the project lasts 16 days, the total indirect costs are $400; 15 days, they will be $250; 14 days, they will be $200; and 13 days, they will be $100. At what day do we achieve the lowest total project cost (i.e., direct plus indirect costs)? Multiple Choice O 16 days O O 14 days O 12 days O o O 15 days 13 days