Q:

“Have you finished your assignment, Minu ?” said her brother.

• 1
  Minu’s brother asked her if she had finished her assignment.
• 2
  Minu’s brother asked Minu if she has finished her assignment.
• 3
  Minu’s brother asked Minu if you have finished your assignment.
• 4
  Minu’s brother said to Minu if she had finished her assignment.