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This problem has to do with the recovery of methanol from a gaseous stream by absorption into water in a tray tower (the gas solvent does not absorb). The mass flow rates at the bottom, densities, and surface tension are as follows: • Gas stream: 2.1 [kg/s]; 1.7 [kg/m3] Liquid stream: 0.7 [kg/s]; 990 [kg/m3]; 0.065 [N/m] Other – Water density: 1,000 [kg/m3]; Reference surface tension: 0.02 [N/m]; O Tray data are as follows: Tray spacing of 60 [cm]; weir height of 4 [cm]; tray (metal) thickness: 2.5 [mm] Tray layout: Hole diameter of 5 [mm] in an equilateral triangular pitch of 12 [mm] • Other data: Foaming factor of 0.90; flooding approach of 70 % Requirements: Please, select the best answer for the following statements: 1. The surface-tension factor is: A 2. The area factor (FHA) is: 3. The constant CF, in [m/s], is: 4. The empirical constant C, in [m/s], is: 5. The superficial gas velocity at flooding, in [m/s], is: 6. The column diameter, in [m], is: