El Capitan Foods has a capital structure of $36\%$ debt and $64\%$ equity, its tax rate is $30\%,$ and its beta $($leveraged$)$ is $1\mathrm{.}40.$ Based on the Hamada equation,

$$ What would the firm$$s beta be if it used no debt i$.$e$.$ what is its unlevered beta, b$\_$U$?$

$$ Now, if the capital structure changed to $60\%$ debt and $40\%$ equity, find the b$\_$L$.$