Write equations that show the processes that describe the first, second, and third ionization energies for a gaseous iron atom.?

Fe(g) → Fe⁺(g) + e⁻ …. ΔH = first ionization energy of Fe atom
Fe⁺(g) → Fe²⁺(g) + e⁻ …. ΔH = second ionization energy of Fe atom
Fe²⁺(g) → Fe³⁺(g) + e⁻ …. ΔH = third ionization energy of Fe atom