consider the function 2x + 6 f(x) - x2+6 Find the critical point(s) of f. Give your answer in the form of a comma-separated list. Express numbers in exact form. Use symbolic notation and fractions where needed. Enter DNE if the function has no critical points.) critical point(s): -3 - V15. 15 - 3 noorTer Use the First Derivative Test to determine whether the critical point(s) yield(#) a local minimum or a local maximum. (Give your answer in the form of a comma-separated list. Express numbers in exact form. Use symbolic notation and fractions where needed. Enter DNE if the function has no local minimum or local maximum.) local minima at x - Incorrect local maxima at x - Find the intervals on which the function is increasing or decreasing Give your answer as an interval in the form (",*). Use the symbol co for infinity, U for combining intervals, and an appropriate type of parenthesis "(",")", "["."I" depending on whether the interval is open or closed. Enter @ if the interval is empty. Express numbers in exact form. Use symbolic notation and fractions where needed.) f is increasing on Incorrect f is decreasing on Incorrect