The data below contains mileage, age, and selling price for a sample of 33 sedans. Use the estimated regression equation that predicts the selling price of a used sedan given the mileage and age of the car to answer the following questions. (Let x1 represent the mileage of the car, x2 represent the age of the car, and y represent the selling price of the car.) = 20385.25 0.03739x1 686.3367x2 (a)Estimate the selling price (in $) of a three-year-old sedan with mileage of 50,000 miles. (Round your answer to the nearest dollar.)