What are the Stages of the Contact Process? Give the Equations for each one of them.

-First Stage is simply making Sulphur Dioxide, by Burning Sulphur in the Air [Sulphur + Oxygen --> Sulphur Dioxide] [S + O₂ --> SO₂ -Second Stage has the Sulphur Dioxide being Oxidised to make Sulphur Trioxide [Sulphur Dioxide + Oxygen ⇌ Sulphur Trioxide] [SO₂ + O₂ ⇌2SO₃] -Final Stage has the Sulphur Trioxide being Dissolved in Water to make Sulphuric Acid [Sulphuric Trioxide + Water --> Sulphuric Acid] [SO₃ + H₂O --> H₂SO₄]