For the following exothermic reaction system at equiLiBrium: H₂O(g) + CO(g) ⇌ CO₂(g) + H2(g), choose the changes that will shift the equiLiBrium position to the right?
1) Decreasing the concentration of COâ‚‚(g)
2) Increasing the concentration of Hâ‚‚O(g)
3) Increasing the concentration of CO(g)
4) Decreasing the concentration of H2(g)