複選題7. Let g be the function given by g(x) =dt. Which of the following statements about g must be true?I. g is increasing on the interval (1,2). Ⅱ.g is increasing on the interval (2,3).III. g(3) ＞0 (A) I only (B) II only (C) II only (D) II and IIl only (E) I, I, and III。