Question 12 Worth 10 points a. Sketch the plane curve r (t) = ti + taj and the vectors T(t) and N(t) when t = 1 . (Do NOT attempt to find T(t) and N(t) when making this sketch, and note that this a 2-dimensional sketch). b. Find the scalar tangential component of acceleration ar of a particle with position vector r(t) = 5ti + (t2 + 5)j