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Q2. The cost of manufacturing a lot of a certain product depends on the lot size, as shown below: Lot size, x Cost, hundreds of dollars, y 2 5 9 10 16 25 35 50 65 100 120 250 275 500 495 a) Find the least squared estimators Sxx, Sxy and Syy b) Find the y-intercept, a, and slope, b C) Write the equation for the best fit line d) Using the best fit line, determine the cost estimate for a lot size of 1200 e) Determine the correlation coefficient, r, and comment on the relationship between cost and lot size