Use the information contained below to compress one time unit per move using the least cost method. Answer questions 64 through 67. Note: The "Cost to Reduce the Max Amount" column is the cost over the "Max (Total) Amount Activity Can be Reduced" Activity Predecessor Duration Normal Cost Max. Amount Activity Can be Reduced Cost to Reduce Max. Amount Crash Slope B D E F None A B DE 1 wk 3 wks 4 wks 3 wks 4 wks 3 wks $100 $150 $200 $200 $200 $150 0 2 wks 1 wk 1 wk 2 wks 1 wk 0 $200 $50 $60 $140 $90 What is the normal duration of the project? 10 weeks 18 weeks 13 weeks 15 weeks 12 weeks