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If you wish to find the least squares line of best fit y = max + c through the points (2, 1), (2, 3), and (5, 4), what system should you solve? Select one alternative: 2 1 m O A" Ax = ATb, where A = 2 1 b = 3 , X = 2 O A" Ax = ATb, where A = 2 c , b = , X = y C 2 O AT Ax = Ab, where A = 3 b = , X = OT N 2 1 C O A Ax = Ab, where A = 2 3 ,b = C , X= y