Yuki collects data on the average number of sunlight hours per month. She determines the regression model y = -2.8sin(0.65x + 120.2) + 12.2 to represent the data, where x = 1 represents January. Based on the regression model, what is the best estimate for the average number of sunlight hours she can expect each day in June? a) 9.4
b)9.9
c) 11
d) 15