(A) Find all critical values of .
If there are no critical values, enter -1000.
If there are more than one, enter them separated by commas.
Critical value(s) =

(B) Use interval notation to indicate where is decreasing.
Decreasing:

(C) Find the -coordinates of all local maxima of .
If there are no local maxima, enter -1000.
If there are more than one, enter them separated by commas.

Local maxima at =

(D) Find the -coordinates of all local minima of .
If there are no local minima, enter -1000.
If there are more than one, enter them separated by commas.