CONSIDER THE FUNCTION: f(x)=x+3x32

(e) Give the intervals of concavity of f (a). Note: Use the letter U for union. To enter oo, type infinity with a lower case i. If the function is never concave upward or concave downward, enter NA in the associated response area. concave upward: concave downward:(c) Give the intervals of increase and decrease of f (.17). Note: Use the letter U for union. To enter 00, type infinity with a lower case i. If the function is never increasing or decreasing, enter NA in the associated response area. increasing: (0, infinity) 9 E? ' decreasing: (infinity, 78),(78,O) 9 E? ' (d) Give the local maximum and minimum values of f (3). Enter your answers in increasing order of the cv-value. If there are less than two local extrema, enter NA in the remaining response areas and the corresponding drop-down menu. Include a multiplication sign between symbols. For example, a - 1r. @_ >= -8 ee' o @ f( f( 7 )2 0 a la isalocal mini... 0