4. The parallel homogeneous reactions A+Br1C,r1=k1CACB,Ar2D,r2=k2CA occur in a steady-state plug flow reactor where v is uniform, v=v0. The reactor feed contains only A and B. (a). Write mass balances for A,B,C,D. By eliminating r1 and r2 in these balances, express CC and CD as CC=(CB0CB),CD=(CA0CA)(CB0CB) Do not employ extents of reactions