mass balance problem

An ironmaking blast furnace produces hot metal of the composition: 93.6%Fe,2.1%Si, 3.6%C,0.7%Mn. The composition of the iron ore is 78%Fe2O3,9%SiO2,5% Al2O3,1%MnO,7% moisture. Coke rate is 850kg/thm. Composition of the coke is 80%C,10%SiO2,5%CaO. Enough limestone is charged to make 45%CaO in slag and composition of limestone is 100%CaCO3. Calculate (i) Weight of ore used per tonne of hot metal production; (ii) weight of slag produced per tonne of H.M.; (iii) weight of limestone used to produce given slag composition