Rewrite the underlined sentence below using the right modal, must or may / might?

Rewrite the underlined sentence below using the right modal, must or may / might. Look at the example : Example : A : What time does the show finish? B : I am sure it finishes at 10. → It must finish at 10. A : Where does Mary live? B : I don't know, but I am sure she lives near here because she comes walking. → ________ A : Who is that man standing next to the door. B : I have no idea. Perhaps he's a student. → ________ . A : When is the exam? B : The teacher didn't say but I am sure it will be next week. → ________ . A : Where is Bob? B : I don't know, but perhaps he's in the office. → ________.