Step 1: Identify the pronoun changes.
In the indirect sentence, he refers to the brother speaking, so in direct speech he becomes I. Me becomes you, and my homework becomes your homework.
Step 2: Identify the tense shift reversal.
Would help in indirect speech was the backshift of will help. Reversing it, the direct speech should use will help.
Step 3: Confirm option 2.
I will help you with your homework correctly reverses all pronoun and tense changes.
\[ \boxed{\text{I will help you with your homework}} \]