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QUESTION 3 Consider the following regression model: 5-B.+PP+B.A+BA#+BA +u. where'S is the sales of a company, P is the price of a product; and A is the advertisement of the company. The sample size is N=105. We want to test whether advertisement has an effect on sales or not. What is the joint hypothesis test corresponding to this test. The restricted and unrestricted sum of squared errors are SSE,#800 and SSEy-500. What is the F statistics for this test O 2 10 Ob:1 OC. 20 Od.5QUESTION 4 Consider the following regression model: y BitB.x+Box+Box+B.x+u. The sample size is N#72. Using F test, we want to test: Ho : B+ B. B. =0 HE: O/. The restricted and unrestricted sum of squared errors are SSE,-1093 and SSE,,#873. What is the F statistics for this test