Normal Time Crash Time Crash Cost Activity (Days) (Days) per day (5) A 6 6 B 10 8 Stam C 5 4 D 4 1 $100 $300 $700 $500 $650 E 9 7 1 F 2 A network of a small project with six activities is shown above, also shown are the normal time and crash time, and the crash cost per day of each activity Refer to the above network and table. If we have to optimally crash the project i) by 1 day we should crash activity it by 2 days we should crash activity/activities im) by 3 days we should crash activity/activities