Q3 [1 pt]: Write the following as triggers for the following schema. In each case disallow or undo the modification if it does not satisfy the stated constraint. Product(maker, model, type) PC(model, speed, ram, hd, price) * hd: hard disk Laptop(model, speed, ram, hd, screen, price) Printer(model, color, type, price) a) When updating the price of a PC, check that there is no lower priced PC b) When inserting a new printer, check that the model number exists in product? c) When making any modification to the laptop relation, check that the average price of laptop for each manufacturer is at least S1,500? with the same speed? d) When updating the RAM or Hard Disk of any PC check that the updated PC has at least 100 times as much hard disk as RAM