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 $200 per day penalty for each day the project lasts beyond day 15. Activity Normal Time Crash Time Crash Cost Immediate (days) Normal Cost ($) (days) ($) Predecessor(s) 900 1,000 1,000 2,200 500 1,000 A B 1,200 N In TmDOW > 1,500 B DIANAWADA 1,500 1,500 C, D 1,300 1,400 E 900 1,500 E 300 600 G a. What is the project's duration if only normal times are used? The project duration is day(s). (Enter your response as an integer.)