Use the given parameters to answer the following questions. If you have a graphing device, graph the curve to check your work. x = 10 - t y = t_ - 12t (a) Find the points on the curve where the tangent is horizontal. (x, y) = smaller t-value larger t-value (x, y) = (b) Find the points on the curve where the tangent is vertical. (x, y) =