Evaluate [(a + y) ds where C is the straight-line segment from P to Q by using two different injective parameterizations of C: r1 : [a1, b]] -> 123 and r2 : [a2, b2] -> 123 such that ri(a, ) = r2(a2) = P and ri(b) = 12(62) = Q. Your answers should be the same with either parameterization