Correct each sentence.Do not change underlined words. 1.I wnoder where are

Correct each sentence.Do not change underlined words. 1.I wnoder where are they. 2.She asks is he a student. 3.He tells he can swim well. 4.She says she like to play the piano. 5.They said they are sad to hear the news 6.She said she can meet us after classes 7.I think you shouldnt buy the text-book