Three activities are candidates for crashing on a project network for a large computer installation (all are, of course, critical). Activity details are in the following table: Activity A B Normal Time Crash Time Normal (days) (days) Cost 7 6 $6,000 4 2 $1,200 11 9 $4,000 Total Cost with Immediate Crashing Predecessor(s) $6,500 $3,000 A $6,400 B a) Activity that should be crashed first to reduce the project duration by 1 day is a) Activity that should be crashed first to reduce the project duration by 1 day is A b) Activity that should be crashed next to reduce the project duration by one additional day is B c) Total cost of crashing the project by 2 days = $(Enter your response as an integer.)