-6 -4 X = -2 y decreasing 6 4 -2 -4 -6 2 4 (i) Identify the critical numbers of f. (Enter your answers as a comma-separated list.) 6 relative maximum X = X (ii) Identify the open interval(s) on which f is increasing or decreasing. (Enter your answer usin notation.) increasing (iii) Determine whether f has a relative maximum, a relative minimum, or neither at each critic (Enter your answers as a comma-separated list.) relative minimum X =

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