Mark Stewart's double helped give Raith a comfortable 3-0 win over Queen of the South.The midfielder hit his sixth and seventh goals of the season as Rovers sealed back-to-back wins to stay sixth in the Scottish Championship.Lewis Vaughan also netted late on as Queen of the South remain fourth, five points behind Rangers.Mark Millar had gone close before Stewart's 23rd-minute opener when he fired into the top corner from inside the area.Ian McShane twice went close for the visitors before Stewart netted from inside the area with 13 minutes left.Vaughan then wrapped up the win eight from time when he found the bottom corner from 14 yards.