1.find the gradient to the curve y = x^3 - 3x^2 at the point x = 3

then find the equations of the tangent and the normal to the curve at the point where x = 3

2. the curve with equation y= x+(24/x) passes through the points A (4,10) and B(8,11)

find the equation of the tangent to the curve at A then the normal at B

thanks