Consider the function below. f(x) = 6xtan(x), -n/2 < x < n/2 (a) Find the interval where the function is increasing. (Enter your answer using interval notation.) %3D (0.) Find the interval where the function is decreasing. (Enter your answer using interval notation.) (-중이) (b) Find the local minimum value. (c) Find the interval where the function is concave up. (Enter your answer using interval notation.) -0,00

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