Retrieve the following data from The World Bank database (https://databank.worldbank.org/source/world-development-indicators) for Pakistan, Portugal, and Colombia for the most recent year available:

1. GDP in constant international dollars or PPP
2. Population
3. GDP per person in constant international dollars
4. Mortality rate, infant (per 1,000 live births)
5. Health expenditure per capita (current U.S. dollars)
6. Life expectancy at birth, total (years)

• Describe the key differences between the countries.
• Rank these as high-, medium-, and low-income countries, and explain what is surprising or expected about this data.
• Use the Rule of 72 to estimate how long it will take for Pakistan, Portugal, and Colombia to double their standards of living.