Suppose an investment earned 4%, -9%, 12% and -11% over 4 months.

1-What was the arithmetic average return? Answer in percent, rounded to two decimal places.

2-What was the compound average return? Answer in percent, rounded to two decimal places.

3-What was the total return? Answer in percent, rounded to two decimal places.

4-What was the volatility (sample standard deviation) of returns? Answer in percent, rounded to two decimal places.