Question $2($a$).$ Given a black surface at $288$ K$,$ es$-$ timate the fraction of its total radiation emission that occurs between $8$ and $13$ micron $($m or $1106$ m$).$ This happens to be the fraction of radiative energy from earth that escapes directly to space without get$-$ ting blocked by the atmosphere.Question $2($b$).$ Determine the wavelength at which we should expect the peak intensity of radiation emit$-$ ted by the earth, assuming its average temperature is $288$ K