Question: 2. I have a relational database schema: Professor = Transcript = (Studentld.CrsCode. Semester, Grade) Student = (Student!d, name, Deptld, year, address) CourseOfferings = (CrsCode. Semester)

2. I have a relational database schema: Professor = Transcript = (Studentld.CrsCode. Semester, Grade) Student = (Student!d, name, Deptld, year, address) CourseOfferings = (CrsCode. Semester) Course = Cr-Code. CrsTitle, CrsDescription) Teaches Professorld, CrsCode, Semester) Write out the relational algebra for the following queries. 1). Find the semesters when course 'operating systems' was offered. 2) Find the names and Deptld of all professors who taught in spring 2010

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