A real estate company wants to study the relationship between house sales prices and some Important predictors of sales prices. Based on data from recently gold homes in the space, the following variables are used in a multiple regression model. p' sales price (In thousands of dollars) x total floor area (In square feet] cy number of bedrooms I distance to newrest high school (In miles) The estimated model Is as follows. P= 160 +0.0783 + 21x7-357 Answer the questions below for the interpretation of the coefficient of x in this mode. (a) Holding the other variables fixed, what is the average change In sales price for each 100-square-foot increase in floor area? dollars [b) Is this change an increase or a decrease? Increase 0 decrease