Question

I said to my brother ,"have you done the work?"

Answer 1

heya
✌️✌️

I asked my brother whether he did the work..

with regards...

Answer 2

Hola !

Here is your answer

This sentence is in direct form.

Here is the indirect sentence --

I asked my brother whether he had done the work.

Always remember, when you convert a direct sentence to indirect sentence you make it into past tense.

and as this is the question, said will be changed to asked ..

Hope it helps !