18. Akram wants to know how large her deposit of $200,000 today will become at a compound annual interest rate of 10% for 6 years 19. . How long does it take to double $50,000 at a compound rate of 8% per year (approx.)? 20. What is the future value of a 5-year ordinary annuity with Monthly payments of $10000, evaluated at a 15% interest rate?(3. Marks)