Question 1 (1 point) Which of the following are all the critical numbers of f(x) = (81 - 22) O a) o O b) - 9, 9 O c) 9, 0 O d) - 9, 0, 9 O e) None of the aboveQuestion 2 {1 point) If f (1:) = 33% (9:2 35) . then fi5 decreasing on which one of the following intervals? 0 3) W45) u mm) 0 b1 (ma) U (V3100) O c} (JEtl) u (0, V3 0 d1 Him) 0 er was)