Which of the following statements about alkali metals and their compounds are correct?

Li reacts more gently with water than Na despite its more negative $E^{\circ }$, because of its higher melting point and lower reactivity kinetics. The heavier alkali metals form superoxides, and $\mathrm{LiOH}$ is much less soluble than $\mathrm{NaOH}$ or $\mathrm{KOH}$ because of its high lattice enthalpy. $\mathrm{KO}{}_2$ contains $\mathrm{O}{}_2{}^{-}$ with one unpaired electron, so it is paramagnetic and the last statement is wrong.