Problem 2. A 1000 kmol/hr liquid stream with 40 mol% n-hexane and 60 mol% n-octane at 1 atm is sent to a horizontal flash drum operated at 1 atm with the goal of producing a vapor stream containing 60 mol% n-hexane. Based on the following specifications: a) liquid residence time: 5 minutes; b) liquid level: 12 full; c) L/D ratio = 4; d) actual allowable vapor velocity = 0.75 x maximum allowable vapor velocity, determine: (a) The design temperature and pressure of the flash drum. (b) The purchased cost (Cp, in $) of the horizontal flash drum, which is correlated to of the drum's volume (Vol, in m) by the following relationship: log sehemu = 3.5565 + 0.3776 log Vol+ 0.0905(log Vol.2 Include all missing yet necessary thermodynamic information obtained from Aspen and show intermediate calculation steps in your answer to receive full credit