(1 point) NOTE: When using interval notation in WeBWorK, remember that: You use 'INF' for Do and '-|NF' for 00. And use 'U' for the union symbol. Enter DNE if an answer does not exist. x f (x) = x2 + 12x + 35 a) Give the domain of f (in interval notation) b) Find the critical numbers of f. (Separate multiple answers by commas.) c) Determine the intervals on which f is increasing and decreasing. Your answer should either be a single interval, such as "(0,1)", a comma separated list of intervals, such as "(-inf, 2), (3,4)" , or the word "none". f is increasing on: f is decreasing on: d) Determine whether each critical point is a relative maximum, minimum, or neither. Relative maxima occur at x = (Separate multiple answers by commas.) Relative minima occur at x = (Separate multiple answers by commas.) 1 (1 point) Consider the function f (x) = cos(x) + Ex This function has two critical numbers A