Show work, thank you :)

For #3 and 4, answer parts a - d and show all of your work. 3. f(x) - 612-1 a) Find the derivative using the definition of a derivative, b) What is the slope of f (x) at x = - 107 c) What is the slope of f (x) at x = 3? d) What Is the equation for the tangent line at x = 3? 4.f (x) = -7x- a) Find the derivative using the definition of a derivative. b) What is the slope of f (x) at x = = 10? c) What is the slope of f (x) at x = 3? d) What is the equation for the tangent line at x = 3