The average time that the sun rises, over the course of a 12-month interval, can be modeled by a periodic function of the form y, equals, a, sine, left bracket, b, x, right bracket, plus, cy=asin(bx) c or y, equals, a, cosine, left bracket, b, x, right bracket, plus, cy=acos(bx) c . Assuming the period of this graph is 4, pi4π, what would the equation be to best model this specific situation?