Two investments generated the following annual returns:

a$.$ What is the average annual return on each investment? Round your

answers to one decimal place.

The average annual rate of return on $x$ :

$\%$

The average annual rate of return on $Y$ :

$$

$\%$

b$.$ What is the standard deviation of the return on investments $x$ and $Y?$

Round your answers to two decimal places.

Standard deviation of $x$ :

Standard deviation of Y:

c$.$ Based on the standard deviation, which investment was riskier?

was riskier.