S Block Elements

Which of the following orders are correct against the stated property?

I. $\mathrm{NaO}_2<\mathrm{KO}_2<\mathrm{RbO}_2<\mathrm{CsO}_2$ - stability

II. $\mathrm{Mg}(\mathrm{OH})_2<\mathrm{Ca}(\mathrm{OH})_2<\mathrm{Sr}(\mathrm{OH})_2$ - basic strength

III. $\mathrm{MgCO}_3<\mathrm{CaCO}_3<\mathrm{SrCO}_3$ - thermal stability