Evaluate each of the following processes applied to cyclononatetraene, and decide whether...

Evaluate each of the following processes applied to cyclononatetraene, and decide whether the species formed is aromatic or not:

(a) Addition of one more π electron, to give C9H10–

(b) Addition of two more π electrons, to give C9H102–

(c) Loss of H+ from the sp3-hybridized carbon

(d) Loss of H+ from one of the sp2-hybridized carbons