(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 the second derivative test to 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 =

(C) Use the second derivative test to 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.