Exercise 6.3.2: Write the following queries, based on the database schema Classes (class, type, country, numGuns, bore, displacement) Ships (name, class, launched) Battles (name, date) Outcomes (ship, battle, result) of Exercise 2.4.3. You should use at least one subquery in each of your answers and write each query in two significantly different ways (e.g., using different sets of the operators EXISTS, IN, ALL, and ANY). a) Find the countries whose ships had the largest number of guns. ! b) Find the classes of ships, at least one of which was sunk in a battle. c) Find the names of the ships with a 16-inch bore. d) Find the battles in which ships of the Kongo class participated.