Seven airline flight 101,102,103,105,106, and 107 are to be scheduled for departure one at a time on the hour, form 9.00 am until 3:00 pm. The scheduled must confirm the following requirements:
Flight 101 must depart at 9:00 am
of light 105 must depart late tan flight 103, and also later than of light 102
Flight 104, 106 and 107 must depart on consecutive hours in that order