help on a,b, c please

H2SO4 (Solution B) to of H2SO4 (Solution A) is to be mixed with a solution containing 90.0wt% H2SO4 (Solution B) to produce a 75.0wt% solution (Solution C). The flow rate and concentration of Solution A change periodically, so that it is necessary to adjust the flow rate of Solution B to keep the product H2SO4 concentration constant. Flowmeters A and B have linear calibration plots of mass flow rate versus meter reading (R), which pass through the following points: Flowmeter A:mA=150lbm/h4RA=25 mA=500lbm/h1RA=70 Flowmeter B:mn=200lbm/h,RB=20 mB=800lbm/h,Rg=60 The analyzer calibration is a straight line on a semilog plot of %H2SO4(x) on a logarithmic scale versus meter reading (Rx) on a linear scale. The line passes through the points (x=20%,Rx=4.0) and (x=100%, Rx=10.0 ). a) Calculate the flow rate of Solution B needed to process 300lbm/h of 55%H2SO4 (Solution A), and the resulting flow rate of Solution C. (The calibration data are not needed for this part.) b) Derive the calibration equations for mA(RA),mB(RB), and x(Rx). Calculate the values of RA,RB, and Rx corresponding to the flow rates and concentrations of Part (a). c) The process technician's job is to read Flowmeter A and the analyzer periodically, and then to adjust the flow rate of Solution B to its required value. Derive a formula that the technician can use for RB in terms of RA and Rx, and then check it by substituting the values of Part (a)