(please help!!) For what values of theta (0 les at han equal to theta less than equal to 2pi) do maximum r-values occur on the graph the polar equation r=4-3sin^3theta? Not that the maximum r-value occurs at a point that is the maximum distance from the pole. a. pi/2, 7pi/6, 11pi/6
b. pi/6, 5pi/6, 3pi/2
c. pi/3,pi, 5pi/3
d. pi/6,pi/2, 5pi/6, 7pi/6, 3pi/2, 11pi/6