### Question 2: Relational Model / Relational Algebra#### Consider the following schema:```Sailors(sid: integer, sname: string, rating: integer, age: real);Boats(bid: integer, bname: string, color: string);Reserves(sid: integer, bid: integer, day: date);```#### Symbols you may need:```∩ -- ∪ -- σ -- π -- ⨝ -- ρ```You may use anything that was covered in the slides.1. **Find the names of sailors who reserved a blue boat, have rating at least 8, and are older than 40.**2. **Find the names of sailors who reserved only blue boats.**3. **Find the names of sailors who reserved at least two boats.** (Similar to our example of “Find the students who earned at least two A’s”)4. **Find the names of sailors who reserved exactly two boats.** (The solution could be based on the previous question)5. **Given the following two records, will Tom and Peter be included in the resulting table of Q2-1 (Question 2 subquestion 1)? Show the reasons.**#### Data:- **Sailors:** - `123, Tom, NULL, NULL` - `124, Peter, NULL, 41` - **Boats:** - `1, ABC, Blue` - **Reserves:** - `123, 1, 10/19/2020` - `124, 1, 10/20/2020`---**Explanation:**The questions above require you to apply relational algebra to solve specific database management tasks. Break down each problem using appropriate symbols and operations taught during the course.**For example:**1. For **finding sailors who reserved a blue boat and have a rating of at least 8 and are older than 40**: - Join the `Sailors`, `Reserves`, and `Boats` relations. - Apply selection to filter for blue boats, ratings ≥ 8, and age > 40. - Project the sailor names.2. For **finding sailors who reserved only blue boats**: - Identify the sailors who booked blue boats. - Ensure that the identified sailors did not reserve boats of other colors

Question 2: Relational Model / Relational Algebra Consider the following schema, Sailors(sid: integer, sname: string, rating: integer, age: real); Boats(bid: integer, bname: string, color: string); Reserves(sid: integer, bid: integer, day: date). Symbols you may need: n --U -- o -- I -- -P You use anything that we covered in the slides. 1. Find the names of sailors who reserved a blue boat, have rating at least 8 and older than 40. 2. Find the names of sailors who reserved only blue boats. 3. Find the names of sailors who reserved at least two boats. (Similar to our example of “Find the students who earned at least two As")

Question 2: Relational Model / Relational Algebra Consider the following schema, Sailors(sid: integer, sname: string, rating: integer, age: real); Boats(bid: integer, bname: string, color: string); Reserves(sid: integer, bid: integer, day: date). Symbols you may need: n --U -- o -- I -- -P You use anything that we covered in the slides. 1. Find the names of sailors who reserved a blue boat, have rating at least 8 and older than 40. 2. Find the names of sailors who reserved only blue boats. 3. Find the names of sailors who reserved at least two boats. (Similar to our example of “Find the students who earned at least two As")

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Bottom two please show how to do, i do not need to understand what I have marked out