The Delta Company Has a Capital Structure of 20% Risky $\beta$

The Delta Company has a capital structure of 20% risky debt with a $\beta$ of .9 and 80% equity with a $\beta$ of 1.7.Their current tax rate is 34%.What is the $\beta$ for Delta Company?

A) 0.59
B) 0.82
C) 1.06
D) 1.49
E) 1.54