For a standard thin accretion disk with Rin Rout and R R$?,$ derive the spectral indices, $,$ of the

specific flux, F in the following three regimes, where F $$ $.$

$($a$)(5$ points$)$ h kT $($low frequencies$)$

$($b$)(13$ points$)$ h $\text{'}$ kT $($intermediate frequencies$)$

$($c$)(3$ points$)$ h kT $($high frequencies