Determine the x-coordinates of the relative extrema of the function g(x) = _ x2 4x + 7 Enter each answer as a comma-separated list of values. The order of the values does not matter. Enter DNE if g(x) does not have any relative maximum or minimum values, respectively. x-coordinates of the relative maxima = x-coordinates of the relative minima = X Submit Answer 23. [-/1 Points] DETAILS Determine whether each statement is true or false. You have one submission for each statement. (a) If f'(c) = 0, then fhas a relative maximum or minimum at x = c. OTrue OFalse (b) If f'(x) changes from positive to negative at x = a, then f has a relative maximum at x = a. OTrue OFalse (c) If f'(x) 2 0 on (a,b), then f is increasing on the interval (a,b). OTrue OFalse (d) If f'(c) does not exist, then f(x) has a critical point at x = c. OTrue OFalse