Exercise 4.3 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 key fields are underlined, and the domain of each field s listed after the field name. Therefore sid is the key for Suppliers, pid is the key for Parts, and sid and pid together fornm the key for Catalog. The Catalog relation lists the prices charged for parts by Suppliers. Write the following queries in SQL 1. Find the names of suppliers who supply some red part. 2 Find the sids of suppliers who supply some red or green part. .Find the sids of suppliers who supply some red part or are at 221 Packer Ave Find the sids of suppliers who supply some red part and some green part. 128 CHAPTER 4 5. Find the sids of suppliers who supply every part 6. Find the sids of suppliers who supply every red part. 7. Find the sids of suppliers who supply every red or green part. 8. Find the sids of suppliers who supply every red part or supply every green part 9. Find pairs of sids such that the supplier with the first sid charges more for some part than the supplier with the second sid 10. Find the pids of parts supplied by at least two different suppliers 11. Find the pids of the most expensive parts supplied by suppliers named Yosemite Sham. 2. Find the pids of parts supplied by every supplier at less than $200. (If any supplier either does not supply the part or charges more than $200 for it, the part is not selected.)