Compute the domestic country beta of Telmex as well as its world beta. What do these betas measure?

The above table provides the correlations among Telemx, a telephone/communication company located in Mexico, the Mexico stock market index, and the world market index, together with the standard deviations (SD) of returns and the expected returns (R). The risk-free rate is 5%.

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Correlation Coefficients SD (%) 18 15 10 R1%) Telmex Mexico World Telmex 1.00 Mexico 90 1.00 Worid 0.60 0.75 1.00 14 12