Use the function f(x) = 13.x14 – 14x1³ to answer the following questions.(a) Find the interval(s) on which f(x) is increasing.Number of increasing intervals: Choose one v(b) Find the interval(s) on which f(x) is decreasing.Number of decreasing intervals: Choose one v(c) Find the interval(s) on which f(x) is concave up.Number of concave up intervals: Choose one v(d) Find the interval(s) on which f (x) is concave down.Number of concave down intervals: [ Choose onev(e) Find the x-coordinate(s) of any/all inflection point(s).Number of inflection points: Choose one v

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Use the function f(x) = 13x4 – 14.x13 to answer the following questions. (a) Find the interval(s) on which f(x) is increasing. Number of increasing intervals: Choose one (b) Find the interval(s) on which f(x) is decreasing. Number of decreasing intervals: Choose one (c) Find the interval(s) on which f(æ) is concave up. Number of concave up intervals:[ Choose one▼ (d) Find the interval(s) on which f (x) is concave down. Number of concave down intervals: [ Choose one▼