In 2001 Windsor Ontario will receive its maximum amount of sunlight 15.28 hrs on Jun 21 and its least amount of sunlight 9.08 hrs on Dec 21?
a. Due to the earth's revolution about the sun, the hours of daylight function is periodic. Determine an equation that can model the hours of daylight function for Windsor, Ontario.
b. On what day(s) can Windsor expect 13.5 hours of sunlight?