Исправьте пожалуйста ошибки

1. This is the cheapest lamp which I could find.

2. We were shivvering in the cold.

3. Have they stored the corn herselves?

4. I have seen much which is useless.

5. They were incredible happy.

6. He is the woman we looked for yesterday.

7. When they left it was too latеly.

1this was the cheapest........2shivering with cold3..........the corn themselves?4I have seen much what(that)is useless5.....incredibly happy6she is the woman.........7........too late.