Among the given sets,which represents the resonating structures?

Write the resonance structures of $CO_3^{2-}$ and $HCO_3^{-}$.

The correct stability order of the following resonance structures is:

With respect to resonance structures of $CO_3^{2-}$ ion, which of the following statements are correct?
$(a)$ All $C – O$ bonds in $CO_3^{2-}$ are equivalent
$(b)$ There are three resonance structures possible for $CO_3^{2-}$ ion
$(c)$ The position of carbon and oxygen should change in every resonance structure
$(d)$ The formal charge on carbon atom is $0$

Among the species: $CO_2$,$CH_3COO^-$,$CO$,$CO_3^{2-}$,$HCHO$,which has the weakest carbon-oxygen bond?

Write resonance structures of $CH_{3}COO^{-}$ and show the movement of electrons by curved arrows.