Hello tutor, need your assistance with these questions below. Thank you

4 3 . . Find the critical number(s) of 5'05) = 3x 12x If there Is/are any. Fill the extra blank(s), if any, with NONE. 351::1 wee 7 2 Find the critical number(s) of y = 9x x2 if there is/are any. Fill the extra blank(s) with NONE. x1 = |:] 3x e 4x+4 Find the critical number(s) of y = if there is/are any. Fill the extra blank(s), if any, with NONE. X1 = 0 X2 = none Submit Answer Incorrect. Tries 4/99 Previous TriesWhich of the following is a critical number of the function y = 2 cos(7x) + 7x on the interval of (0, It ) ? O O 42 O 8 0 0 O 2 1 1x O 12 Submit Answer Incorrect. Tries 1/2 Previous Tries