Use the graph of f' to identify the critical numbers of f, identify the open intervals on which 1' is increasing or decreasing, and determine whether fhas a relative maximum, a relative minimum, or neither at each critical number. (If an answer does not exist, enter DNE.) (a) (i) Identify the critical numbers off. (Enter your answers as a comma-separated list.) X: (ii) Identify the open interval(s) on which 1' is increasing or decreasing. (Enter your answer using interval notation.) increasing decreasing (iii) Determine whether fhas a relative maximum, a relative minimum, or neither at each critical number. (Enter your answers as a comma-separated list.) relative minimum X = relative maximum x (b) y (i) Identify the critical numbers off. (Enter your answers as a comma-separated list.) X: (ii) Identify the open interval(s) on which fis increasing or decreasing. (Enter your answer using interval notation.) increasing decreasing (iii) Determine whether f has a relative maximum, a relative minimum, or neither at each critical number. (Enter your answers as a comma-separated list.) relative minimum x = relative maxi mum X (i) Identify the critical numbers off. (Enter your answers as a comma-separated list.) X: (ii) Identify the open interval(s) on which f is increasing or decreasing. (Enter your answer using interval notation.) increasing decreasing (iii) Determine whether fhas a relative maximum, a relative minimum, or neither at each critical number. (Enter your answers as a comma-separated list.) relative minimum X = relative maximum x (i) Identify the critical numbers off. (Enter your answers as a comma-separated list.) x: (ii) Identify the open interval(s) on which 1' is increasing or decreasing. (Enter your answer using interval notation.) increasing decreasing (iii) Determine whether fhas a relative maximum, a relative minimum, or neither at each critical number. (Enter your answers as a comma-separated list.) relative minimum x = relative maximum x