Am or AM which is correct?

The public is correct. plural and singular verbs can be tricky... but you use a singular verb with a singular noun, and a plural verb with a plural noun. For example: The person (singular) is...

You could say " It's him ! The man I saw following us." Or you could say " It's he who wants to go not I."

The phrase would be written, "That's yours".

Corr.

"Dedicated" is a verb that implies directionality (towards a noun), similar in concepts to the words "pointed" and "drink/drank" (when preparing a toast), so when using the word, it should be said...