Do Not show work just give answer, Finish quick please:

4. Determine the derivative dy of y = 5-2x+7 dx a. dy = -2(5-2x+7) In 5 c. dy = (5-2x+7) In2 dx b. dy _ 2(5-2*+7) In 2 dx dx d. dy = (5-2*+7) In5 5. Determine the x-coordinate of the point for which the tangent is horizontal to the function Ax) =- x a. 2 c. In2 b. d. 1 In 2 6. Determine the minimum value of the function f(x) = e* - 8. C. 0 b. -9 d. There exists no minimum value