Consider the recent performance of the Closed Fund, a closed-end fund devoted to finding undervalued, thinly traded stocks:

Here, price premiums and discounts are indicated by pluses and minuses, respectively, and Period 0 represents Closed Fund's initiation date.
a. Calculate the average return per period for an investor who bought 100 shares of the Closed Fund at the initiation and then sold her position at the end of Period 4.
b. What was the average periodic growth rate in NAV over that same period?
c. Calculate the periodic return for another investor who bought 100 shares of Closed Fund at the end of Period 1 and sold his position at the end of Period 2.
d. What was the periodic growth rate in NAV between Periods 1 and2?

NAV $10.00 11.25 9.85 10.50 12.30 Period Premium/Discount 0.0% -5.0 +2.3 -3.2 3