If f ( 20 ) - 2ac2 - 72 + 4, a) find f (ac) = b) find f' (1) = (Show your work in the ist answer box.) c) Use the above results to find the equation of the tangent line to the parabola f (x) - 2x2 - 7x + 4 at the point (1, - 1). The equation of this tangent line can be written in the form y = mac + b. Since the slope of the tangent line is O the slope of the original function, the y value substituted at x - 1, O the particular derivative at a - 1, O always stayed as 1, the slope of the derivative function, O none of the above, m and (Show your work in the 1st box.)