Please write expressions of relational algebra to answer the following queries. Part d, e, f, g. The answer should work for arbitrary data, not just the data of these figures.I have included figure 2.2 and 2.21. Hint for f and g: if all of the relevant information is in one relation, but you need to use a binary operator, it may be necessary to make copies of the original relation(for example using RENAME). This question is from A First Course in Database Systems third edition by Ullman and Widom. Thank you

2.4.14 Exercises for Section 2.4 Exercise 2.41.1: This exercise builds upon the products schema of Exercise emas 2.3. 1. Recall that the database schema consists of four relations, whose so are Product (maker, model, type) PC(model, speed, ram, hd, price) Laptop(model, speed, ram, hd, screen, price) Printer (model, color, type, price) Some sample data for the relation Product is shown in Fig. 2.20. Sample data for the other three relations is shown in Fig. 2.21. Manufacturers and model numbers have been "sanitized," but the data is typical of products on sale at the beginning of 2007. Write expressions of relational algebra to answer the following queries. You may use the linear notation of Section 2.4.13 if you wish. For the data of Figs. 2.20 and 2.21, show the result of your query. However, your answer should work for arbitrary data, not just the data of these figures