Solve the exercise calculations step by step, please.

(Sh) in the sum of the cout of the feed, (C,C=QQ,, and the cont of mising. C=V. We are intereited in ohtaining the minimum operating cumt and the optimal valuen of the feed rate, Qi reactor volume V. and the coneentration in the reactor Ci. The following Istorder reaction takee place constraint equations, which constrain the valueg of the independent variablem (there is no B in the feed) ind obtain the polution this! minimises the operating costs. Data: C;=85 Ibmol of A. feed cost, Cn=0.01 lbinobft, initial concentnation of , ( ) solumetrie fion rate tif the reactor. ftyh.C=80.30/hft3, cost of mixinn. I' = neactor volume, ft