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Consider the function f(x) = 2x + 5x 1. For this function there are four important intervals: ( - 0o, A], [A, B), (B, C], and [C, co) where A, and C are the critical numbers and the function is not defined at B. Find A and B and C For each of the following open intervals, tell whether f (r) is increasing or decreasing. (- co, A): Select an answer (A, B): Select an answer V (B, C): Select an answer V (C,00) Select an answer V Note that this function has no inflection points, but we can still consider its concavity. For each of the following intervals, tell whether f (I) is concave up or concave down. (#co, B): Select an answer (B, co): Select an answer V