The function f is defined as f(x) = 2e4x2 (a) Find f'(x). f' (x ) = (b) For what value of x is the slope of the tangent line to the graph of f equal to 3? (Round your answer to three decimal places.) X = (c) For what value(s) of x does the tangent line to the graph of fintersect the x-axis at the point (