please correct and show steps for finding Keq

Thosphoglucoisomerase interconverts glucose 6-phosphate to, and from, glucose 1-phosphate. glucose 6-phosphate glucose 1-phosphate After mixing equal amounts of the two molecules, the solution achieved equilibrium at 25C. The concentration at equilibrium of glucose 1-phosphate is 0.01M, and the concentration at equilibrium of glucose 6-phosphate is 0.19M. Calculate the cquilibrium constant, Keq, and the standard free energy change, G, of the reaction mixture