Below are the table for separation, distilation column in Xanthan Gum alcohol recovery process. Help me find the xD and xB$.$ The bottom flow rate $,$L is $166\mathrm{.}76$ kmol$/$h and distillate $,$V is $94\mathrm{.}45$ kmol$/$h$,$ the xanthan gum purity is $99$ to $100$