For the Following Reaction, Calculate The $\Delta$ G at 37°C, Given Concentrations for Glucose-1-Phosphate of 25 MM

For the following reaction, calculate the $\Delta$ G at 37°C, given concentrations for glucose-1-phosphate of 25 mM and glucose-6-phosphate of 1 mM.
Glucose-1-phosphate glucose-6-phosphate $\Delta$ G° = -7.1 kJ/mol

A) -15.4 kJ/mol
B) -8.1 kJ/mol
C) -6.1 kJ/mol
D) 1.2 kJ/mol
E) none of the above