Question 18 [4 points) a. Determine the coordinates of the point on the graph of x) = '9'? + 3H1 where the tangent line is perpendicular to the line 3): %x+ 2. b. Write the equation of the tangent line at this point. Write your answer in the form y=rmr+b. Question 19 [4 points) a. What are two methods for determining the derivative of x) = (X2 +9\" 1309 + 3)? b. Compare the two methods for this particular function