Problem 5-4 (similar to) (Compound value solving for r) At what annual rate would the following have to be invested? a. 5520 to grow to 51.122.64 in 10 years b. $310 to grow to $519.90 in 6 years c. $53 to grow to $572.60 in 21 years d. $212 to grow to $257.69 in 4 years a. At what annual rate would $520 have to be invested to grow to $1,122.64 in 10 years? % (Round to the nearest whole percent.)