In Okunland,a Country That Operates According to Okun's Law,actual GDP

In Okunland,a country that operates according to Okun's law,actual GDP equals $7,520 billion,the actual rate of unemployment is 8%,and the natural unemployment rate is 5%.What is potential GDP in Okunland?

A) $7,500 billion.
B) $7,745.6 billion.
C) $7,752.6 billion.
D) $8,000 billion.
E) $8,121.6 billion.