[Relational Algebra]
Using the above information, please write relational algebra expressions and display tables to answer the following. Do NOT write in SQL code.
1. Select all staff that happen to be female with a salary more than $20,000
2. List all staff that happen to have a salary between $20,000 and $30,000
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[Relational Algebra] Using the above information, please write relational algebra expressions and display tables to answer...
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