4. An effluent gas stream containing 7.0% mole SO2 at 175 psig and 80F is fed to a gas absorption column at 243 m min to remove SO,. The density of the feed gas in units of mole L is given by p=12.2P/7 where P in atm. and T'in K. The solvent whose specific gravity is 1.03 is fed at 1000 L min. The target mole fraction of in the clean gas stream is L.0% mole. a. Draw and label the process flow diagram for this process. b. Show that the degree of freedom of this problem is zero. c. Calculate the flow rate of SO2 that has been removed from the effluent gas.