now based on the sql above answer this question: now answer this output/question 1. Top 10 countries with the highest average life expectancy. 2. Top 5 countries with the most number of languages used. 3. Top 5 most popular languages in the South America region. 4. Top 10 countries with the lowest total_investment from the year 2015. 5. All cities, their population_count and their total city_proper_population_category.
a. Low population if less than 2,000,000
b. Average population if less than 5,000,000
c. High population if less than 27,000,00