Japanese: hito or kata (person)?

Question

I saw in my Japanese book two sentences that said the word person in them.

Could I interchange the words hito and kata?

examples:

Ano hito wa dare desu ka?

Ano kata wa dare desu ka?

Who is that person?

Yamada-san wa dono kata desu ka?

Yamada-san wa dono hito desu ka?

Which person is Mr. Yamada?

or does it matter which 'person' is used in the sentence type?

Answer 1

According to the Denshi Jisho, "kata" means "person in charge of" and "hito" means simply "person" or "man."

Answer 2

Kata is more polite. Hito is a plain way of saying it.

So, it depends on who you are talking to and how respectful you feel.