(b) y (i) Identify the critical numbers of F. {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 fhas a relative maximum, a relative minimum, or neither at each critical number. (Enter your answers as a commaseparated list.) relative minimum x = relative maximum X =