Please calculate the correct solution of the following Problem
Problem- A solution of galactose at 20oC is at equilibrium with a specific rotation of +80.2o. If 28.0% of the galactose is alpha-D-galactose (specific rotation of 100% alpha-D-galactose is +150.7o).
Part 1- What is the specific rotation of beta-D-galactose?
I need help to find the specific rotation of beta-D-galactose.