Please help separation principles

QUESTION 2 A feed mixture containing 100 kmol/h enters a flash drum at 690 kPa and 366.5K. The feed contains 17, 23, 28, and 32 mol% propane, n-butane, n-pentane, and n- hexane, respectively. It can be assumed that equilibrium has been reached in the drum. Table 2: The K-values Component K propane 3.8 n-butane 1.5 n-pentane 0.6 n-hexane 0.25 Calculate the equilibrium flowrate of the vapour and liquid streams leaving the flash drum. Iterate at least three times until the same result is obtained. (HINT: Calculate the mole fraction of the feed that enters as vapour). (24) [24 Marks]