An exothermic reaction $A<mi\; id="EditorElement\_5011652">B</mi>$ has an equilibrium conversion that changes with temperature as described in the plot below. The reactants cannot be cooled beneath $475K.$

Explain to a layperson, why increasing the amount of inert fed to a reactor performing an exothermic reaction results in less of an exotherm. Show qualitatively on the graph.

Draw $($qualitatively$)$ what a Levenspiel plot would look like for the irreversible analog of this reaction. Based on this, would you propose a single or series reactor design and what kind. Briefly explain.