Among the products under the type "promo brushed steel", how many of them are manufactured by Manufacturer#5?
type "promo brushed steel" refers to p_type = 'PROMO BRUSHED STEEL'; Manufacturer#5 refers to p_mfgr = 'Manufacturer#5'
SELECT COUNT(p_partkey) FROM part WHERE p_type = 'PROMO BRUSHED STEEL' AND p_mfgr = 'Manufacturer#5'