[질문] HOw old are you?를 간접의문문으로바꾸면 어떻게바뀌나요

I asked to the boy how old he was. 등, 으로 he 랑 the boy 부분에 님이 넣고싶은것을 넣어주시면됩니다^^혹은 I'd like to know how old are you 입니다