a. A reaction takes place in a reactor containing 1 kg of catalyst which is in the form of spherical pellets. Another reactor has a catalyst in the form of slab-shaped pellets. To obtain the same reaction rate observed in the reactor with the spherical pellet catalyst, how many kg of slab-shaped pellet catalyst is needed? (5 points) Hint: The graphs below show how the effectiveness factor changes with Thiele modulus for different catalyst geometries. Flat catalyst Cylindrical catalyst Spherical catalyst 13 07 05 0. 0 b. A strongly diffusion-limited reaction takes place in a reactor with a heterogeneous catalyst supported by a porous medium. What would be the reaction rate when the porosity of the porous support is increased to three times its original value? Justify your reasoning with calculations. (5 points)