CREATE TABLE table_29574 ("Name/Name of Act" TEXT, "Age ( s ) " TEXT, "Genre" TEXT, "Act" TEXT, "Hometown" TEXT, "Qtr. Final  ( Week ) " FLOAT, "Semi Final  ( Week ) " TEXT, "Position Reached" TEXT)

What is the age of the act who is a rapper?
SELECT "Age(s)" FROM table_29574 WHERE "Act" = 'Rapper'
SELECT "Age(s)" FROM "table_29574" WHERE "Act" = 'Rapper'