Answer the following questions for the function
defined on the interval .

a.) Enter the -coordinates of the vertical asymptotes
for this function as a comma-separated list. If there are none, enter NONE .

Answer:

b.) is concave down on the region(s):

Note: Your answer to part b
will be a comma-separated list of intervals. Intervals shoud be given in
interval notation. If it is not concave down anywhere,
enter NONE .