e. 12 pt] Handling Empty Cells: Notice that some of the cells in the population column of countries are empty strings. Use the following command to explicitly set these empty cells to NULL by updating the table as follows: UPDATE countries SET population = NULL where populations!! With the empty cells filled with null values, you can use the IS NOT NULL keyword to exclude such rows in any query Once you have updated the countries table to fill the empty cells with null values, list the top 5 most populated countries along with the sum of all medals (gold, silver and bronze combined) won by the country. Your result should be ordered by country population from highest to lowest For example: if 'United States' has won 10 medals in total and United Kingdom' has won 12. but USA is more populated than UK, then your result should order them as follows: United States, 10 United Kingdom, 12 Format of each line in the output (5 lines total) full_country_name, sum_of_medals