Consider the following equilibrium for which (H

How will each of the following changes affect an equilibrium mixture of the three gases:
(a) O2(g) is added to the system1;
(b) The reaction mixture is heated;
(c) The volume of the reaction vessel is doubled;
(d) A catalyst is added to the mixture;
(e) The total pressure of the system is increased by adding a noble gas;
(f) SO3(g) is removed from the system?