Need help asap 3-6

3. Supposes that the line tangent to the function f(x) at the point (5, 4) is perpendicular to the line that passes through the points (5, 4) and (-3, 8). What is the value of f'(5)? d) -2 e) undefined NIH b ) - C ) 2 4. Let f(x) be the function given below. Which of the following statements are true about f(x) ? anions f ( x) =V16 -x2 -45x