Ethyl ethanoate is subjected to the following reactions. Select the correct statements.

1. Aaqueous $\mathrm{NaHCO}{}_3$ liberates $\mathrm{CO}{}_2$
2. Bexcess $\mathrm{CH}{}_3\mathrm{MgBr}$, then $\mathrm{H}{}_3\mathrm{O}{}^{+}$, gives 2-methylpropan-2-ol
3. Cconcentrated $\mathrm{NH}{}_3$ gives ethanamide
4. D$\mathrm{LiAlH}{}_4$, then $\mathrm{H}{}_3\mathrm{O}{}^{+}$, gives only ethanol as the organic product