3.  Solution:
*Find out and input the trip length form take off to landing, store as variable ‘TL’
*Find out and input how long Marys Delay Time – ‘DT’
*Calculate LT and TL, store as variable ‘MT’
*Find out and input available landing times at Courtenay Airport, ‘AT’
*Compare ‘MT’ to ‘AT’
*If ‘MT’ is later than ‘AT’ they must go to Smitts Field