The earliest occurrence time for event ‘1’ is 8 weeks and the latest occurrence time for event ‘1’ is 26 weeks.The earliest occurrence time for event ‘2’ is 32 weeks and the latest occurrence time for event ‘2’ is 37 weeks. If the activity time is 11 weeks then the total float will be
(a) 11 (b) 13 (c) 18 (d) 24