$[10]($b$)$ The feed to a distillation column contains $60$:$40$ percent methanol:water mixture respectively. The product recovered from the condenser at the top of the column contains $90\%$ methanol, and the bottom product flowrate from the column is $4600k\frac{g}{h}$ and contains $94\%$ water. A portion of the top product is recycled to the column as reflux. Calculate the reflux ratio and the flowrate of the missing streams.