State the Smallest $\theta \text {-interval }(0 \leq \theta \leq k)$

Essay

State the smallest $\theta \text {-interval }(0 \leq \theta \leq k)$
that gives a complete graph of the polar equation $r=3 \sin 2 \theta \text {. }$ Sketch the graph and label the graph to show which petals are generated by positive values of r and which by negative values of r.