8. A project has the activity duration and cost information indicated in the table where all times are in weeks. Predecessor Activity A B A A Normal Time 8 12 15 3 9 Crash days 5 9 10 2 16 C B Normal Cost $12,000 $20,000 $24,000 $10,000 $17,000 $5,000 $14,000 $22,000 $50,000 $33,000 Crash Cost $21,000 $30,000 $60,000 $15,000 $34,000 $6,000 $20,000 $30,000 $55,000 $50,000 16 C E D A H F,G,I 8 12 6 11 16 10 5 a) What is the critical path and the total project cost without any crashing? b) What is the total cost for completing this project in 45 days