Find the Indicated Term for the Geometric Sequence $\frac{1}{2}, \frac{1}{6}, \frac{1}{18}, \ldots$

Multiple Choice

Find the indicated term for the geometric sequence.
- $\frac{1}{2}, \frac{1}{6}, \frac{1}{18}, \ldots$ ; a 5

A) $\frac{1}{162}$

B) $\frac{1}{30}$

C) $\frac{1}{81}$

D) $\frac{1}{54}$