You have invested in 4 stocks: X, Y, Z and fred. X: beta of 1.1 and you invested $10,000 in it; Y: beta of 1.2 and you out $20,000 in it; Z: beta of 0.8 with a $10,000 investment; Fred: beta of 0.9 and a $30,000 investment. What was the beta of this 4-stock portfolio?