Hello,

1. I can't open the files which probably show what you have done so far

2. Calculate the derivative. Use chain rule:

3. You already know that r'(5) = 0. A fraction equals zero if the numerator is zero (and the denominator is not zero, of course):

4. You already know that the point M(5, 9) is placed on the graph of the function:

Thus the equation of the function is:

5. To find the vertical asymptotes you have to calculate the zeros of the denominator:

Solve for x. I've got

6. I've attached a diagram of the function.