can you give me few questions related to relative clause????pleas i need it within 1 day

Following are some questions on relative clause.

Pick out the relative clauses in the following sentences:

He is the man who was gave the speech yesterday.

This is the school where I studied.

She was searching for the book which was in her hand.

She offered a proposal which Nick did not accept.

The children who do not take care of their health are prone to diseases.