Write SQL query to solve given problem: Find the 5-star business in Ahwatukee, AZ and identify it's business category.. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT T1.business_id, T3.category_name FROM Business AS T1 INNER JOIN Business_Categories AS T2 ON T1.business_id = T2.business_id INNER JOIN Categories AS T3 ON T2.category_id = T3.category_id WHERE T1.city = 'Ahwatukee' AND T1.stars = 5