4. Albert Einstein once noted that “compounding of interest is one of humanity’s greatest
inventions.” To illustrate the mind-boggling effects of compounding, suppose $100 is
invested at the end of each year for 25 years at i = 50% per year. In this case, the
accumulated sum is $5,050,000! Now it is your turn. What amount is accumulated after 25
years if the interest rate is 30% per year?