Consider the following function. Use a graphing utility to confirm your answers for parts (a) through (c). (If an answer does not exist, enter DNE.)f(x)=9|x - 41(a) Find the critical numbers of f. (Enter your answers as a comma-separated list.)X =(b) Find the open intervals on which the function is increasing or decreasing. (Enter your answers using interval notation.)increasingdecreasing(c) Apply the First Derivative Test to identify all relative extrema.(x, y) =relative maximumIrelative minimum(x, y) = Consider the following function. Use a graphing utility to confirm your answers for parts (a) through (c). (If an answer does not exist, enter DNE.)f(x) = +² +249(a) Find the critical numbers of f. (Enter your answers as a comma-separated list.)X =(b) Find the open intervals on which the function is increasing or decreasing. (Enter your answers using interval notation.)increasingdecreasing(c) Apply the First Derivative Test to identify all relative extrema.(x, y) =relative maximumrelative minimum(x, y) =

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Consider the following function. Use a graphing utility to confirm your answers for parts (a) through (c). (If an answer does not exist, enter DNE.) f(x)=9|x4| (a) Find the critical numbers of f. (Enter your answers as a comma-separated list.) X = (b) Find the open intervals on which the function is increasing or decreasing. (Enter your answers using interval notation.) increasing decreasing I (c) Apply the First Derivative Test to identify all relative extrema. relative maximum (x, y) = relative minimum (x, y) =