Помогите пожалуйста! Put the adjectives in brackets into the comparative or the superlative.
1.I'm .... (short) student in my class.
2.Tom is .... (thin) Gred.
3.He's .... (energetic) person I know.
4. Claire is .... (friendly) her sister.
5.My brother is .... (good) at windsurfing than I am.