Considerthe function at) 2 at 2. (a) Simplify the following difference quotient as much as possible f(4 + h) - fl4) h = z {to} Use your result from (a) and the limit denition of the derivative to calculate myw 2 z {C} Use your answer from part {b} to find the equation of the tangent line to the curve at the point [4, f{4]). y