Eliminate the parameter for the given set of parametric equations and sketch the graph of the parametric curve. [20pts] (a) x = 3cost y = 4 sint (c) = = Vt+1 y = t+1 (b) x = 2e-3t y = e- + 2e-3t - 8 (d) x= 3 - 2 cos 3t y = 1 + 4 sin 3t