Calculate the Percent Abundance of the Two Isotopes of a Fictional

Multiple Choice

Calculate the percent abundance of the two isotopes of a fictional element,georgium,if it has an average atomic mass of
Go-290 289.86 u
Go-292 292.07 u

A) Go-290,38% and Go-292,62%
B) Go-290,62% and Go-292,38%
C) Go-290,42% and Go-292,58%
D) Go-290,58% and Go-292,42%
E) cannot be determined