Find the Indicated Sum $a _ { 1 } = 3 , r = \frac { 1 } { 2 } ; \text { find } s _5$

Multiple Choice

Find the indicated sum.
- $a _ { 1 } = 3 , r = \frac { 1 } { 2 } ; \text { find } s _5$

A) $\frac { 93 } { 16 }$
B) $\frac { 3 } { 8 }$
C) $\frac { 3 } { 16 }$
D) 93