A very large distillation column is separating p-xylene (more volatile) from 0-xylene. The column has two feeds (similar to Figure 4-17, but without the side stream). Both feeds are saturated liquids. Feed 1 is 42mol% p-xylene, F1=90kmole/hr. Feed 2 is 9 mole % p-xylene, F2=20kmole/hr. The bottoms product should be 97% o-xylene and the distillate product should be 99%p-xylene. Find the flow rates D and B