1. The curve C is given by the equation y=mx3-x2+8x+2, for a constant m
A) find dy/dx
The point P lies on C, and has the x-value 5
The normal to C at P is parallel to the line given by the equation y+4x-3=0.
B)find the gradient of the curve at C at P.
C) (I) the value of m,
(ii) the y-value at p.
Just really stuck on this question any help would be brilliant