Find the Indicated Term of a Geometric Sequence from the Given

Multiple Choice

Find the indicated term of a geometric sequence from the given information.
- $a _ { 1 } = 24$ and $a _ { 2 } = - 18$ . Find the sixth term.

A) $- 186$
B) $\frac { 243 } { 32 }$
C) $- \frac { 729 } { 128 }$
D) $\frac { 729 } { 128 }$