Use a process simulator to solve the following flash distillation problem. Feed is \(2 \mathrm{~mol} \%\) methane, \(30 \mathrm{~mol} \%\) n-butane, \(47 \mathrm{~mol} \% \mathrm{n}\)-pentane, and \(21 \mathrm{~mol} \% \mathrm{n}-\) hexane and is a liquid. The flash drum is at \(1.0 \mathrm{~atm}\), it is adiabatic (heat duty = 0 ), and there is no heat exchanger. Initially, for the feed, set vapor fraction \(=0\) (a saturated liquid) and set the temperature. You want to obtain V/F in the drum of 0.4000 (rounded off to the fourth decimal). Find the feed temperature that gives this value of V/F. (As you do runs, note that feed pressure for a saturated liquid increases as feed temperature is increased. Why?) Once you find the correct feed temperature, remove the feed specification that vapor fraction \(=0\) and specify a feed pressure that is \(1.0 \mathrm{~atm}\) above the pressure reported by Aspen Plus when vapor fraction of feed \(=0\). Liquids that are saturated liquids (this is what Aspen means by vapor fraction \(=0\) ) cannot be pumped easily. By raising the pressure, we make pumping easy. Rerun simulation one last time to check that you have met all requirements. Expect to do several Aspen Plus runs to solve this problem. Report the feed temperature and pressure, drum temperature, heat duty in drum, \(x\), and \(y\) values.