13. Provided below are sets of non-equivalent resonance structures. Circle the structure in each set that would be the major contributor to the resonance of the compound. a) = b) c) ==* 14. Determine the formal charge of the indicated atoms in each of the following structures (b) (a) (c) (d) a) b) c) d) 15. Determine the formal charge of the indicated atoms in each of the following structures. (a) 62 (b) (c) a) b) c) d) 16. Determine the formal charge of the indicated atoms in each of the following structures (b) . (a) (c) (d) b) a) c) d) 17. Draw the two (2) equivalent resonance structures of the nitrite anion, NO