please help me solve these 2 question it is very urgent

(7 marks) Suppose f(x) = 2ar + box - 4c where a, b and c are real constants. Suppose that f has a horizontal tangent line at a = 2, and that the tangent line to f at r = 0 is given by y = 8x + 4. Use the given information to find all possible values for a, b, and c. Explain your reasoning.4. [i5 marks) Here is some data about Ivan Khatchatourian, one of the instructors for this course, at two different -|mm @i__ time: in his life. m| under 9 pounds over 13f] pounds Fully justify your answers to the questions below, using facts and theorems from the course. Note: Ivan has had a quiet and simple life and nothing sudden or unexpected has happened in terms of his height or weight. (a) Show that at least onoe during his life, luan's weight was 512] pounds (h) Show that at least onoe during his lifer luan's height in inches equalled his weight in pounds