Find the Partial Sum of the Geometric Sequence with the Given

Multiple Choice

Find the partial sum of the geometric sequence with the given first term and common ratio
- $\mathrm{s}_{12}, \mathrm{a}_{1}=\frac{1}{2}, \mathrm{r}=-3$

A) -66431
B) - 66433
C) -66430
D) $-\frac{132853}{2}$