Please answer the second part about how long it takes, thanks

2) (30 pts) In a manufacturing process, an organic solvent (MEK component B) is used to dissolve a thin coating of a polymer (component A) film away from a nonporous flat surface of length 20 cm and width 10 cm as shown in the figure below. The thickness of the polymer film is initially uniform at 0.2 mm. In the process, MEK solvent is added at a flow rate of 30 cm3/s to an open flat pan of length 30 cm and width 10 cm. The depth of the liquid MEK solvent in the pan is maintained at 2 cm and it leads to solvent velocity of 1.515 cm/s. Determine the average flux, (g of A)/(cmxs), from the surface and how long will it take for the polymer film to completely disappear? 30 cm3/s liquid MEK Polymer film (initially 0.2 mm thick) 2 cm Exiting MEK x=0 x= 20 cm x= 30 cm Length of pan = 30 cm, width of pan = 10 cm At process conditions, below data is given: - Diffusion coefficient of dissolved polymer (solute A) in the MEK solvent (B) DAB = 3x10-6 cm2/s - Kinematic viscosity of liquid MEK VB = 6x103 cm(note: VB = ub/PB) - Density of solid polymer film material Pa = 1.05 g/cm3 - Density of liquid MEK PB = 0.8 g/cm3 - Maximum solubility of dissolved polymer in the MEK solvent on the surface CA,1 = 0.04 g/cm3 and assume that the concentration of the dissolved polymer in the bulk solvent is CA,00=0 Hint: While calculating Re, use w = 20 cm as characteristic length