Please show calculation when it is neccessary

Stock A Stock B

Expected Return: 10% 15%

Standard Deviation 5% 9%

You did some additional research, and also found the following values for each stocks beta coefficient:

Stock A Stock B

Beta Coefficient 0.7 1.4

Other current information is as follows:

--Current Risk-free Rate: 5%

--Current Market Rate: 12%

1. What type of risk are we now considering?

2. What is the current Market Risk Premium?

3. What is the required return for each stock suggested by CAPM?

4. Will diversification reduce the type of risk identified in #1 above?

5. Is there anything that can help to reduce this type of risk in a portfolio of stocks? If so, what.

6. Suppose that you invest $1,000 in Stock A, $1,500 in Stock B, and $2,500 in Stock C that has a beta of 2.0. Find your portfolios beta and required rate of return.