Consider the function at) : 3326; a. State the intervals of a: where f(:c) is concave up. [use exact values, no decimals] b. State the intervals of a: where f (3:) is concave down. [use exact values, no decimals] c. Identify any inflection points on the graph of f(:1:) as ordered pairs. [you may use decimals here, place commas between any ordered pairs.]