Sketch the appropriate curves. A calculator may be used. The available solar energy depends on the amount of sunlight, and the available time in a day for sunlight depends on the time of the year. An approximate correction factor (in min) to standard time is C = 10 sin 1/29 (n − 80) − 7.5 cos 1/58 (n − 80), where n is the number of the day of the year. Sketch C as a function of n.