what arw the correct answers ?

4. You have $5,000 to invest for five years. a. How much additional interestaill you eang if the investment provides a 4% annual return when compared to a 2% annual return? (5%) b. How long will it take your $5,000 to double in value if it earns 4% annually2 (10%) c. What annual rate has been earned if $5,000 grows into S20,000 in 20 years? (10%) (Underline your final answer for a, b and c, e.g., Ans.:XXXX)