Find the Sum of the Infinite Geometric Series $$\sum _ { n = 0 } ^ { \infty } 4 ( 0.8 ) ^ { n }$$

Find the sum of the infinite geometric series.? $$\sum _ { n = 0 } ^ { \infty } 4 ( 0.8 ) ^ { n }$$ ?

A) 24
B) 20
C) 22
D) 21
E) 19