26. Pol Perritt purchased 100 shares of Waunakee Inc. and held the stock for four years. Pol 's holding-period returns over these four years were:

Year Return 1 +20%

2 +30%

3 +50%

4 -90%

a. What was the value-relative of Pol's investment over the four-year period?

b. What was Pol's geometric mean return for the four-year period?