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Assume that the returns on individual securities are generated by the following two - factor model: Rit = E ( Rit ) + beta

Assume that the returns on individual securities are generated by the following two-factor model:
Rit=E(Rit)+\beta ijF1t+\beta i2F2t
Here:
Rit is the return on Security i at Time t.
F1t and F2t are market factors with zero expectation and zero covariance.
In addition, assume that there is a capital market for four securities, and the capital market for these four assets is perfect in the sense that there are no transaction costs and short sales (i.e., negative positions) are permitted. The characteristics of the four securities follow:
Security \beta 1\beta 2 E(R)
11.5002.00030%
2.7502.75030
31.500.75020
41.800.90010
a.
Construct a portfolio containing (long or short) Securities 1 and 2, with a return that does not depend on the market factor, F1t, in any way (Hint: Such a portfolio will have \beta 1=0.)(A negative answer should be indicated by a minus sign. Do not round intermediate calculations.)
a-1. Compute the expected return and \beta coefficient for this portfolio. (Do not round intermediate calculations and enter your expected return answer as a percent. Leave no cells blank - be certain to enter "0" wherever required.)
b. Construct a portfolio containing Securities 3 and 4, with a return that does not depend on the market factor, F1t, in any way. (A negative answer should be indicated by a minus sign. Do not round intermediate calculations and round your answer to 1 decimal, e.g.,32.1.)
b-1. Compute the expected return and \beta 2 coefficient for this portfolio. (Do not round intermediate calculations and enter your expected return answer as a percent. Leave no cells blank - be certain to enter "0" wherever required.)
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