Types of Terms

State what kind of terms the following are according to their sign, whether or not they have a denominator, and whether or not they contain radicals: $5a^{2}$, $-4a^{3}b$, $\frac{2a}{3}$, $\sqrt{a}$, $-\sqrt[3]{5b^{2}}$, $\frac{\sqrt{a}}{6}$, $-\frac{4a^{2}b^{3}}{\sqrt{6a}}$