Show workings please

A point P moves in a plane so that at time q its coordinates are given by x = 4 sinq , y = 5 cosq ofq $ 2p a) Find the Cartesian equation of the curve. b) Sketch the curve; what type of curve is it? c) Show that = - 1.25 tang. d) Find the equation of the tangent to the curve at the point (4 sing , 5 cosq)