I need help with question 5.3-5.6

solution: https://www.chegg.com/homework-help/Database-Systems-6th-edition-chapter-5-problem-2RQ-solution-9780132943260

TextBook: database systems a practical approach to design implementation and management 6th

5.2 Explain the following terms (a) relationally complete (b) closure of relational operations 5.3 Define the five basic relational algebra operations. Define the Join, Intersection, and Division operations in terms of these five basic operations 5.4 Discuss the differences between the five Join operations: Theta join, Equijoin, Natural join, Outer join, and Semijoin. Give examples to illustrate your answer 5.5 Compare and contrast the tuple relational calculus with domain relational calculus. In particular, discuss the distinction between tuple and domain variables. 5.6 Define the structure of a (well-formed) formula in both the tuple relational calculus and domain relational calculus