The Honda Accord was named the best midsized car for resale value for 2018 by the Kelley Blue Book (Kelley Blue Book website). The file AutoResale contains mileage, age, and selling price for a sample of 33 Honda Accords.

**Price:** 16998, 17599, 15998, 15998, 11599, 13998, 14998, 11599, 12599, 14998, 15998, 11599, 10499, 14599, 10599, 16998, 20998, 11599, 12599, 13599, 11599, 9599, 18998, 12599, 12599, 10998, 11998, 12998, 17599, 9998, 9998, 16998, 17599

**Mileage:** 35000, 16000, 42000, 61000, 102000, 109000, 60000, 88000, 58000, 27000, 32000, 95000, 123000, 54000, 68000, 40000, 7000, 81000, 70000, 86000, 92000, 120000, 20000, 63000, 70000, 88000, 86000, 60000, 45000, 96000, 60000, 36000, 45000

**Age:** 3, 3, 3, 4, 7, 4, 5, 9, 8, 6, 4, 8, 8, 5, 11, 4, 1, 9, 6, 5, 7, 10, 2, 7, 6, 10, 6, 6, 2, 11, 11, 2, 2

The estimated regression equation is:

\[ \text{Selling price} = 20385.25049 - 0.03739 \times \text{Mileage} - 686.33668 \times \text{Age} \]

Round your answers to the nearest dollar.

**a.** Estimate the selling price of a four-year-old Honda Accord with mileage of 40,000 miles.

**b.** Develop a 95% confidence interval for the selling price of a car with the data in part (a).

**c.** Develop a 95% prediction interval for the selling price of a car with the data in part (a).