Solve the Problem $\mathrm { a } _ { 1 }$

Multiple Choice

Solve the problem.
-If $\mathrm { a } _ { 1 }$ is 1 , and $\mathrm { r }$ is $\frac { 1 } { 4 }$ , find $\mathrm { S } _ { 5 }$ .

A) $\frac { 341 } { 256 }$
B) $\frac { 5 } { 384 }$
C) 341
D) $\frac { 1 } { 192 }$