The Book house, SBH has decided to purchase RAID arrays to store the database shown in Figure 1. Which levels of RAID would you advise them to use and why?

Branch Publisher Em ployee EmployeeID CHAR(8) BranchID INT Branch Name VARCHAR(45) Branch Address VARCHAR ONumberOfEmployees INT PublisherID CHAR(3) PublisherName VARCHAR(45) PublisherCity VARCHAR (30) Publish&Contactio AR(10) EmployeeName VARCHAR(45) EmployeeType VARCHAR(20) Supervisor-EmployeeID CH Indexes Indexes Inventory DutyRoster EmployeeID CHAR(8) BranchID INT t Branch_BranchID INT Book_BookID INT AvailableQuantity INT Indexes t WorkingShiftID INT Book BookID INT WorkingShift WorkingShiftID INT workingShiftWeekDay VARCHAR (15) workingShiftStartTime TIME(6) WorkingShiftEndTim e TIME(6) dutyType VARAR(20) Indexes BookTitle VARCHAR(45) BookType VARCHAR (45) Book Price DECIMAL (8,2) 1sPaperback VARCHAR(3) Writes Author_AuthorID INT Book_BookID INT Author AuthorID INT AuthorName VARCHAR(45) AuthorE mail Address V ARCHAR (45) Indexes sequenceNumber INT Publisher, Publisher!D CHAR(3) Indexes Figure 1 : Relational Data Model