Question

This is her bike. It's .... (her/hers/she's)

Answer 1

This is her bike. It's hers.

ДАША, если после местоимения идет существительное, то ставим HER, если существительного нет, то ставит HERS
Например:
It is her cat. This cat is hers.
This is my doll. This doll is mine.
I