Problem 2: Suppose that you are running a large restaurant chain that gen- erates a significant portion of revenue from food truck meal sales. You have received the following report from your staffs, "We made a least square regression to estimate the dependence of our revenue on the number of food trucks we deploy. Our regression equation is Y = a + bx, where X is the number of trucks we send out each month and Y is our monthly revenue. In the past 10 months, our average monthly revenue is $470k. The average number of trucks in operation is 55. Based on our estimates, a and b, if we increase the number of our trucks to 70, we can bring our monthly revenue up to $575k." Question: use the above information to determine values of and your staffs obtained from the least square regression to make the above claim.