$$In early $2018,$Microsoft Corp had a market capitalization of $$716$b$,$$ $89$b $$in debt, and $ $133$b $$in cash. Hence, Microsoft business value was $($$$716$b$)-($$ $133$b$-$$$89$b$)).$If Microsoft equity beta was $1\mathrm{.}04,$estimate the beta of Microsoft underlying business enterprise, on the assumption that debt and cash investments are both risk$-$free.