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Expected Return: Discrete Distribution

A stock's return has the following distribution:

Demand for the Company's Products	Probability of This Demand Occurring	Rate of Return if This Demand Occurs (%)
Weak		0.1		-50	%
Below average		0.2		-8
Average		0.4		9
Above average		0.2		25
Strong		0.1		75
		1.0

Calculate the stock's expected return and standard deviation. Do not round intermediate calculations. Round your answers to two decimal places.

a. Expected return: %

b. Standard deviation: %