please help with advanced reaction engineering!!

A reaction is done in a gas phase PFR. A+3BC+D There is a recycle after the product separation so that there is product in the feed so that FC0=FD0=0.25FA0. There is also inert present in the feed so that FI0=0.5FA0. The reagents are fed in a stoichiometric ratio. (N.B. If your answer is a fraction, enter it using a decimal point, e.g. enter 1/4 as 0.25 ) Calculate for the reaction. = Calculate B. B= Calculate C c= Calculate D. D= Calculate yA0 yA0= Calculate