1. Use the quadratic polynomial C=a+bs2 to find an approximate solution for the following nonlinear problem. s1dsd(sdsdC)0.2C2=0 The boundary condition is symmetry at the center of the catalyst pellet, and at s=1; dsdC=2Sh[CCB] Sh=4 and CB=12mM 2. Plot the concentration as a function of radial position. 3. Find the flux at s=1 for Sh=4 and CB=12mM, if DA=2107m2/s and the radius is R= 1.2mm