Resonance in carbonate ion $CO_3^{2-}$ is shown below. Which of the following statements is true?

The correct stability order of the following resonance structures is:

Given below are two statements :
Statement $I$ : Experimentally determined oxygen-oxygen bond lengths in the $O_3$ are found to be same and the bond length is greater than that of a $O=O$ (double bond) but less than that of a single $(O-O)$ bond.
Statement $II$ : The strong lone pair-lone pair repulsion between oxygen atoms is solely responsible for the fact that the bond length in ozone is smaller than that of a double bond $(O=O)$ but more than that of a single bond $(O-O)$.
In the light of the above statements,choose the correct answer from the options given below:

Which of the following resonating structures of $1$-methoxy-$1, 3$-butadiene is least stable?

Which of the following is the most stable canonical structure among all?

Draw the resonance structures of $NO_2$, state its shape, and indicate the bond angle and bond length.