Compute the accurate answer of the following question

Question- A wet gas reservoir produces 170,516 scf/STB of 0.646 specific gravity separator gas and 64.7o API stock tank liquid. The separator operates at 555 psia and 89 oF. The separator system is two-stage. As a keen engineer you pick up that the densitometer is faulty and the correct specific gravity of the separator gas was in fact 0.670 and not 0.646.

Part 1- Calculate the specific gravity of the reservoir gas.

Part 2- How would this affect the specific gravity of the reservoir gas calculated?

I need help to find the specific gravity of the reservoir gas.