Download the MONDIAL database (the mondial-schema.psql is used to create the tables, mondial-inputs.psql contains the data along with the queries to load it into the database, and mondial-drop-tables.psql contains the queries to delete these data once this assignment is completed). 1 SQL exercises (100 pts) Load the data in the database and list the queries and their results for each of the following questions. 1. (20 pts) How many distinct airports are in the database? 2. (20 pts) What's the longest country code and how many characters it has? 3. (20 pts) Which country has the largest number of airports? 4. (20 pts) Which country has the largest largest land area comprised of islands? 5. (20 pts) Which countries have a population between 1% and 10% of the world population