A) B) A point is moving along the space curve whose position vector is given as: R(1)=(2 cos)+(2 sint)j + (√51)k. Find the unit tangent vector, and the length of the curve portion (0≤1≤π). Find a vector parallel to the line of intersection of the planes: (3x-6y-2z = 15), and (2x+y-2z = 5), the find the parametric equations of the intersection line.