Please help me answer the following questions that is attached in the photo. Please use a step by step of what you are doing for the question so i can understand what you did. This a highschool level question so please solve it so a highschooler can understand.

13. For the function y=x* -18x* +32, a) b) c) d) e) find the CRITICAL POINTS, expressing them as ordered pairs [2] determine the increasing and decreasing intervals [3] classify one of the critical points by clearly applying the first derivative test. [2] classify a different critical point by applying the second derivative test [2] find the interval(s) where the function is concave up [3] determine the absolute maximum and absolute minimum values of the function on the interval [-1,5] [2]