Using the six basic operators, in a single instruction, Write a relational algebra expression that returns the name of Staff that assisted checkout books for Sam.

Six basic operators select: o project: 11 union: set difference: - Cartesian product: x rename: P Instructions Try to answer all the questions using what you have learned in class. Please make your query general not data related Staff Reservation SIR sName Joan Pam Greg biD mID sld Quantity numberOfDays Status b1 M2 s11 1 Closed b2 M3 s12 2 PassDue b2 M1 53 1 2 Closed s3 Member Book mID M1 mName Sam Paul Ron bID brittle numberOfCopy CategorybAuthor b1 Algorithm 2 Math Aline b2 Database 3 CS Sean b3 Gone with 4 Fiction John the wind Laura Question 7 (3 Points) Write a relational algebra expression that returns the name of Staff that assisted checkout books for 'Sam