This is the third time I've had to post this question. The past two responses have been nonsense. Please only reply if you know what you're doing. Otherwise, you're wasting valuable time! Thank you.

The Advanced Tech Company has a project to design an integrated information data base for a major bank. Data for the project are given in the following table. Indirect project costs amount to $150 per day. The company will incur a $100 per day penalty for each day the project lasts beyond day 17.

a. What is the project's duration if only normal times are used?

b. What is the minimum-cost schedule?

c. What is the critical path for the minimum-cost schedule?

Activity Normal Cost ($) Normal Time (days) 5 Crash Time (days) Immediate Predecessor(s) 3 4 3 C 4 3 D 3 Crash Cost ($) 1,600 1,200 900 1,500 1,700 1,400 1,200 500 800 1,000 600 1,200 1,500 1,300 900