A steam boiler uses pulverized coal in the furnace. The ultimate analysis of coal (by mass basis) as received is: C =78% Ash = 10% H2 =3% O2 =3% Moisture = 5% Excess air supplied is 30%. Calculate the mass of air to be supplied a. 4.01 kg

b. 4.61 kg

c. 3.03 kg

d. 3.53 kg