Question 7 A curve has equation
y=(1)/(5)(5x^(4)-20x^(3))
. a) i) Find
(dy)/(dx)
. [ 2 ] ii) Find the coordinates of the stationary values on the curve. [ 3 ] b) For each stationary value, use calculus to determine if it is a maximum, a minimum or a point of inflexion. [ 4 ]