Answer:
Expected range of returns = -3.50% to 14.70%
Explanation:
As per the properties of bell curve, 68% of the data is within one standard deviation.
Expected range of returns = Mean - Standard deviation to Mean - Standard deviation
Expected range of returns = 5.6% - 9.1% to 5.6% + 9.1%
Expected range of returns = -3.50% to 14.70%