Help on Query

I have 3 tables: category,budget,transaction
The budget and transaction tables have categoryId and amount fields. They both have a one to many relationship from the category table. I need to return CategoryID,Budget.Amt,Transaction.Amt. Each row is a different CategoryId with the sum of the budget amts for that CategoryId and the sum of the transaction amounts for that CategoryId.

How do I write this query?

Thanks in advance