The following relational database schema contains information about products including pcs, laptops and printers. Product (model, maker, price) Pc (model, product, speed, ram, hardDisk) Laptop (model, product, speed, ram, hardDisk, screen) Printer (model, product, color, type) (a) [02 points] Write a SQL query to store the fact that PC model 1500 is made by manufacturer A, has speed 3.1, RAM 1024, hard disk 300, and sells for 2499 Euros. (b) [01 point] Suppose that manufacturer B buys manufacturer C. Write a SQL query to change all products made by C so they are now made by B. (c) [02 point] Write a SQL query that for each PC, doubles the amount of hard disk and adds 1024 megabytes to the amount of RAM. a