5Differentiation Rules Tangents NormalsHard5 marksThe equation of a curve isy=−21x+x3−3x−2.Find an equation of the normal to the curve at the point (6,11). Give your answer in the form ax+by+c=0, where a, b and c are integers to be found.WorkingTypeWriteMath0 words=0Grade answerSolutionGrading criteria