Chapter 9.2, Problem 12CV

Rose curves are characterized by equations of the form $r=a\cos \left(n\theta \right)$ or $r=a\sin \left(n\theta \right),a\ne 0$. If $n\ne 0$ is even, the rose has _____ petals; if $n\ne \pm 1$ is odd, the rose has _______ petals.