Answer the following questions for the function [math] defined on the interval [math].

a.) Enter the [math]-coordinates of the vertical asymptotes of [math] as a comma-separated list. That is, if there is just one value, give it; if there are more than one, enter them separated commas; and if there are none, enter NONE .


b.) [math] is concave up on the region .

Note: Give your answer in interval notation.

c.) Enter the [math]-coordinates of the inflection point(s) for this function as a comma-separated list.