Consider the following database schema and example instance: ingredient recipe fooditem stock Notes: - Underlined attribute form the primary key of a relation. - The attribute recipe of relation ingredient is a foreign key to relation recipe. The attribute fooditem of relation ingredient is a foreign key to relation fooditem. - The attribute fooditem of relation stock is a foreign key to relation fooditem. Q1) Write a relational algebra expression that returns the food items required to cook the recipe "Pasta and Meatballs". For each such food item return the item paired with the number of ounces required by the recipe