Напишите пожалуйста , 4 предложения на Past Perfect, в которых будет придаточное предложение ( два на which, два на who).

Yesterday I found my album which I had lost in summer.Last week I met my teacher who had taught me.The children ate a cake which I had cooked.She brought a book which she had bought in the bookstore. He was the first in his family who had entered the university.