a) Find the point of intersection of the tangent lines to the curve r(t) = (3 sin(t), 2 sin(t), 6 cos(t)) at the points where t = 0 and t = 0.5. (x, y, z) = b) Find both tangent lines. Illustrate by graphing the curve and both tangent lines. (The tangent lines will be plotted for -1 u 1. Select Update Graph to see your responses plotted on the screen. Select the Submit button to grade your responses.) tangent line at t = 0 (x(u), y(u), 2(u))- tangent line at t = 0.5 (x(u), y(u), z(u))