SCENARIO 13-13 An econometrician is interested in evaluating the relationship of demand for building materials to mortgage rates in Los Angeles and San Francisco. He believes that the appropriate model is Y = 10 + 5X1 + 8X2 where X1 = mortgage rate in % X2 = 1 if SF, 0 if LA Y = demand in $100 per capita Referring to Scenario 13-13, the fitted model for predicting demand in San Francisco is ________. Question 40 options: 15 + 8X2 10 + 5X1 10 + 13X1 18 + 5X1