Rank the following salts in order of decreasing lattice energy: AlF₃, NaCl, CsCl, SrF₂, CaF₂.
(1) AlF₃ > SrF₂ > CaF₂ > NaCl > CsCl
(2) NaCl > CsCl > SrF₂ > CaF₂ > AlF₃
(3) AlF₃ > CaF₂ > SrF₂ > NaCl > CsCl
(4) CaF₂ > AlF₃ > SrF₂ > NaCl > CsCl
(5) CsCl > NaCl > SrF₂ > AlF₃ > CaF₂