$\backslash$table$[[$Ground Heat Flux,$-12\mathrm{.}5],[$Latent Heat Flux,$217\mathrm{.}4],[$Sensible Heat Flux,$58\mathrm{.}0],[$Downward longwave radiation flux,$320\mathrm{.}7],[$Downward shortwave radiation flux,$498\mathrm{.}2],[$Upward longwave radiation flux,$495\mathrm{.}4],[$Upward shortwave radiation flux,$34\mathrm{.}0]]$

$($a$)$ Calculate the net radiation.

$($b$)$ Sketch the energy balance at the land surface with upwards$/$downwards arrows as appropriate for the given fluxes.

$($c$)$ Is the energy balance closed? Why or why not?