4. The file stocktonQdat contains 940 observations on home sales in Stockton, CA in 1996. They are a subset of the data in the file stockton.dat. 1. iii. iv. Vi. Use least squares to estimate a linear equation that relates house price PRICE to the size of the house in square feet SQFT and the age of the house in years AGE. Comment on the estimates. Suppose that you own two houses. One has 1400| square feet; the other has 1800 square feet. Both are 20 years old. What price do you estimate you will get for each house. Use the White test (with cross-product term included] to test for heteroskedasticity. 2_ Estimate {:1 and \"2 in the variance function as _ EXP (\"1+a25QFT) Using the variance assumption from part (iv), find generalized least squares estimates for the parameters of the equation estimated by least squares in part (a). Comment on the results. Use the results from part (V) to estimate the prices you will get for your two houses