Easy!!!
Mk I: Blackmore, Evans, Lord, Simper, Paice
Mk IIa: (minus Evans & Simper), + Gillan & Glover
Mk III: (minus Gillan & Glover), + Coverdale & Hughes
Mk IV: (minus Blackmore), + Bolin —> line-up splits completely
Mk IIb: as Mk IIa (first Mk II reunion)
Mk V: as Mk IIa/b, but minus Gillan and + Turner
Mk IIc: Turner departs, Gillan returns = as Mk IIa/b (second Mk II reunion)
Mk VI: Blackmore departs, Satriani steps in, otherwise as Mk IIa/b/c
Mk VII: Satriani departs, the Morse era begins, otherwise as Mk IIa/b/c
Mk VIII: Lord retires from the road, Airey joins, otherwise as Mk VII
Mk IX: Morse retires ending his era, McBride joins, otherwise as Mk VIII, current line up: Paice (since Mk I),
Gillan & Glover (since Mk II), Airey (since Mk VIII) + McBride (new kid)