2. The reaction aA+bBcC+dD has the rate expression of rA=kACAaCBb. What is the expression for the rate of formation of B ? 3. Multiple steady states are observed in a nonisothermal CSTR. Answer the following: (i) Sketch the steady-state reactor temperatures vs. entering temperatures to identify critical points. (ii) Label the stable and unstable steady-states. (iii) Label and name the two critical points. What happens at these critical points? (iv) Why is it important to identify where these multiple steady states can occur