(15 points) Q7. Consider the following Schema: Suppliers(sid: integer, sname: string, address: string) Parts(pid: integer, pname: string, color: string) Catalog(sid: integer, pid: integer, cost: real) The Catalog relation lists the prices charged for parts by Suppliers. Write the following queries in SQL: 1. (5 points) Find snames of suppliers who supply every red part. 2. (5 points) Find sids of suppliers who supply only red parts. 3. (5 points) Find the sid of suppliers who charge more for some part than the average price of that part.