Need help with these three, thank you!

Consider the function f (x) = C + 150(c) Give the intervals of increase and decrease of ffac}. 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: decreasing: (d1 Give the local maximum and minimum values of f (5:). Enter your answers in increasing order of the m-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 - 11'. _@ i: @ _l J '--_-, I El )2 fa"; . IQ |-..;- I it (9] Give the intervals of concavity of f {.13). Note: Use the letter U for union. To enter 00. 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 downward: Ii'fini'.;.- 2