Suppose data on advertising expenditures and revenue (both in thousands of dollars) for a certain restaurant follow. Advertising Expenditures Revenue 1 18 2 33 4 44 6 40 10 51 14 53 20 55 (a) Let x equal advertising expenditures (in thousands of dollars) and y equal revenue (in thousands of dollars). Use the method of least squares to develop a straight line approximation of the relationship between the two variables. (Round your numerical values to two decimal places.)(b) Test whether revenue and advertising expenditures {both in thousands of dollars) are related at a 0.05 level of signicance. (Use the Ftest.) State the null and alternative hypotheses. O HO: 50 = 0 Ha: So i 0 O H0: ,61 a: 0 Ha: 1 = 0 O HO: 50 a: 0 Ha: SD = 0 O H0: ,61 = 0 Ha: 131 i 0 O H0: ,61 2 0 Ha: 1