The levered beta for a corp is $1\mathrm{.}50.$ The firm has a debt$-$to$-$equity ratio of $13\mathrm{.}3$ and an effectivetax rate of $24\%.$

what is the unlevered beat for the corp?

if the corp's effective tax rate increased, would the levered beta increase or decrease? what if the debt$-$to$-$equity ratio increased?