2. Solve the isothermal diffusion and reaction in a sphere; i.e., Ded (r2 2) = koni = Ca(r = Rp) = CSA. CA (r = 0) = 0 dr . a. Find u(s) = CAD/CSA, S = r/Rp. (Hint: You will want to apply the substitution u = yls and solve for y(s).) b. Find n as a function of the Thiele modulus, o = R/3 (k/D.) 2. c. Repeat (a) and (b) for the same system but with finite external transport resistance; i.e. (r = Rp) = ke(c(r = R) - A) dr where Cha is the bulk concentration of A. In this case you will need to define u(s) Ca(r)/CDA d. Plot n() for Sh = kR/De spanning to