Below is estimated model of market values of houses Market Values-47331.38-825.161 House Age +40.91107 Square Feet a. Refer to the estimated model. Are the impacts of "House Age" and "Square Feet" consistent with your expectations? What other variables you think would also have an impact on the market value of the houses. b. Refer to the estimated model. If the age of a house increases by 1 year given that the square feet is held constant, what is the impact on the house's market value?