Find the transition points. f(x) = x(15 - x)1/3 (Use symbolic notation and fractions where needed. Give your answer in the form of a comma separated list.) The transition point(s) at x = 45 15, 4 Incorrect Find the intervals of increase/decrease of f. (Use symbolic notation and fractions where needed. Give your answers as intervals in the form (*, *). Use the symbol . for infinity, U for combining intervals, and an appropriate type of parenthesis "(", ")", "[", or "]" depending on whether the interval is open or closed.) The function f is increasing when x E (-00, 4 The function f is decreasing when x E 4 , 15 U ( 15 ,00 )