Two activities on the same critical path are candidates for crashing on a network. Activity details are in the table below. Activity Normal Time Crash Time Normal Cost Crash Cost $6,000 $6,800 8 days 7 days $4,000 $5,000 10 days 8 days B a. To cut one day from the project's duration, activity(ies) should be crashed (enter a single capital letter or a sequence of capital letters in alphabetical order, separated by commas and no spaces). b. This would cost (enter a dollar amount with dollar sign: use commas if necessary)