The table below provides the correlations among Green, a telephone/communication company located in Mexico, the Mexico stock market index, and the world market index, together with the standard deviations of returns and the expected returns. The risk-free rate is 5%. Based on the stock market data given in the following table, compute Greens world beta.

	Green	Mexico	World	Standard deviations of returns (%)	Expected returns (%)
Green	1.00	.90	0.60	20	?
Mexico		1.00	0.80	18	14
World			1.00	15	12