I am having trouble with C and D. I would like some help to make sure I am correct and an explanation on how to find it if I am wrong.

C.

Critical point is -3

There is no max and min

I am not sure about increasing and decreasing intervals.

D.

Concave up (-inf, -3)

Concave down (-3, inf)

No inflection points?

Given rm = A) Find all asymptotes. B) Find the x and y-intercepts. C) Find the critical points. Find intervals where f(x) is increasing and deceasing. Identify all maximums and minimums. D) Identify the interVals where f(x) is concave up and concave down. Identify any inection points