He enquired, ‘When do you intend to pay me?’- Change the sentence into indirect speech

He enquired, ‘When do you intend to pay me?’- Change the sentence into indirect speech.

1.       He enquired when I intend to pay him.

2.       He enquired when I intended to pay him.

3.       He queried if I intend to pay him.

4.       He queries when I intend to pay him.

Answer: He enquired when I intended to pay him.