4. It is given a curve C: y = f(x) such that f' (x) = 2x2 + 3x - 41. Find the values of k such that its tangent to Cat x = k is parallel to the straight line 3x - y + 5 = 0. WP 5. 16 It is given a curve C : y = 3x +1 such that dy . Find the points on C such that the x - 5 dx (x-5)2 slopes of the tangents to C at these points are -4