Найдите производителей самых дешевых цветных принтеров. Вывести: maker, price

Задание: 18 (Serge I: 2003-02-03)

SELECT DISTINCT product.maker, printer.price
FROM product, printer
WHERE product.model = printer.model
AND printer.color = 'y'
AND printer.price = (
SELECT MIN(price) FROM printer
WHERE printer.color = 'y'
)