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, by]-> 1R3 and r2 : [02, b2] -> 123 such that ri(a, ) = r2(a2) = P and ri(b ) = 12(b2) = Q. Your answers should be the same with either parameterization. Evaluate f Va2 + yds along the curve r(t) = (4 cost, 4sint, 30) for te [-2x, 2x]