please i want the b part solved

and c part please

(a) Air containing 4 mol\% SO2 is going to be scrubbed in a counter-current plate column. Water with 0.1 mol\% SO2 is used as absorbent. A minimum SO2 fractional recovery of 95% is required. The flow rates of air and water are 20molh1 and 60molh1. respectively. The equilibrium relationship between the mole fraction of SO2in air and water is given by y=2.5x. What is the mole fraction of SO2 in exit water? How many theoretical stages are required for this process? [10 marks] (b) Derive the following form of Kremser-Souders-Brown equation and use in to estimate the number of theoretical stages for the process described in (a) if a minimum SO2. fractional recovery of 98% is required. [8 marks] N=lnAln[(1FR1)(1A1)+A1] (c) Explain how you would expect the number of theoretical plates changes with the mole fraction of SO in inlet water in the process described in (a), if the fractional recovery of SO2 remains constant. [3 marks] (d) Adsorption of a solute from its aqueous solution on activated carbon particles: complies with Langmuir isotherm, q=K+cqef Explain how the values of the isotherm constants (qe and K) are estimated using a set of experimental data for q and cat equilibrium condition. [4 marks] All parameters in the following equations have their usual meanings. [Total 25 marks] Kremser-Souders-Brown equation Fractional recover N=lnAln[(youtyout)ylsygut)(1A1)+A1]yout=KxlnA=KVL