text: SELECT PC.model, price
  FROM Product JOIN PC ON Product.model = PC.model 
  WHERE Product.maker = 'Intel'
  UNION 
  SELECT Laptop.model, price
  FROM Product JOIN Laptop ON Product.model = Laptop.model 
  WHERE Product.maker = 'Intel'
  UNION 
  SELECT Printer.model, price
  FROM Product JOIN Printer ON Product.model = Printer.model 
  WHERE Product.maker = 'Intel'
  ;