Consider the function f(.'B) : $261233. (a) f is concave up for a: E (b) f is concave down for a? E (c) The inflection points of f occur at a: 2 Note: Input U, infinity, and -infinity for union, co, and 00, respectively. If there are multiple answers, separate them by commas. If there is no answer, input none. . . l ConSIder the function ac) 2 m. m (a) f is concave up for a: E (b) f is concave down for :1: E I (c) The inflection points of f occur at m = Note: Input U, infinity, and -infinity for union, 00, and 00, respectively. If there are multiple answers, separate them by commas. If there is no answer, input none