Английский язык. помогите соединить предложения с помощью who, which or whose

Question

1.The man is the manager of the company. You were talking to him.
2.I found three letters in the morning post. Two if them were from our partners.
3.Steven is an economist. His office is in Baker Street.
4.Adam Smith is a philosopher. He wrote his famous book in Economics.
5.There is a student in our group. His work in Economics won the first prize.
6.I am working at a project. It is very interesting.
7.She received ten letters. Some of them were from England.

Юля · Accepted Answer

1. The man whom you were talking to, is the manager of the company. 2. Two of three letters which I found in the morning post, were from our partners.3. Steven, whose office is in Baker Street is an economist. 4. Adam Smith, who wrote his famous book in Economics is a philosopher.5. There is in our group a student whose work in Economics won the first prize.6. I am working at a project which is very interesting.7. Some of ten letters which she received, were from England.