Problem 5 (4 points) d a) (2 points) Let y be the curve given by r(t) = (t, t2, t), t ER. Find the tangent unit vector 7(1) to the curve y at T(1). Show all your work and write your final answer as a vector where each component is a quotient of two numbers. b) (2 points) Let y be the curve given by r(t) = (2t2, 2 cost, 2 sint), t ER. Find the arclength of the curve y for 0