please can anyone help?

Consider the function below. (If an answer does not exist, enter DNE.) F(x) = x\\/ 18 x (a) Find the interval of increase. (Enter your answer using interval notation.) ( H [\\3 ) v | 8 Find the interval of decrease. (Enter your answer using interval notation.) (12,18) e (b) Find the local minimum value(s). (Enter your answers as a comma-separated list.) (12,12 3 6):: Find the local maximum value(s). (Enter your answers as a comma-separated list.) (18,0) x (c) Find the inection point. (x. n = ( ) Find the interval where the graph is concave upward. (Enter your answer using interval notation.) I Find the interval where the graph is concave downward. (Enter your answer using interval notation.) I (oo,18 I (d) Use the information from parts (a)-(c) to sketch the graph. Check your work with a graphing device if you have one. .37 )f' 30 25 2t] 15 Need Help? 3. [-/1 Points] DETAILS SCALCET8 4.3.069. Let K(t) be a measure of the knowledge you gain by studying for a test for t hours. Which do you think is larger, K(8) - K(7) or K(3) - K(2)? Is the graph of K concave upward or concave downward? Why? This answer has not been graded yet.1. [0/1 Points] DETAILS PREVIOUS ANSWERS SCALCET8 4.2.025. If f(4) = 11 and f '(x) 2 3 for 4