The equation used to predict annual cauliflower yield (in pounds per acre) is y = 23,686 +4.514x, -4.661x2, where x, is the number of acres planted and x, is the number of acres harvested. Use the multiple regression equation to predict the y-values for the values of the independent variables. (a) x, = 37,200, x, = 37,500 (b) x, = 38,900, x, = 39,100 (c) X, = 39,800, x, = 40,000 6 (d) x, = 43,100, x, = 43,200