(a) find the unit vectors that are parallel to the tangent line to the curve y = 2 sin(x) at the point (π/6, 1). (enter your answer as a comma-separated list of vectors.) (b) find the unit vectors that are perpendicular to the tangent line. (c) sketch the curve y = 2 sin(x) and the vectors in parts (a) and (b), all starting at (π/6, 1)