$100$ g mol$/$h of a saturated hexane$-$octane vapor F$,$ containing $68\%$ mol of hexane, is separated by a distillation process. At the top of the tower, $85$ g mol$/$h of vapor V is obtained and passed through a condenser to convert it into a distilled liquid D with a composition of $93\%$ mol hexane. In order to increase the efficiency of the operation, a part of the product L is recirculated to the distillation tower. A stream B containing $5\%$ mol of hexane is obtained from the lower part of the tower.

Determine the product streams from the top and bottom of the tower.

Determine the L$/$D ratio