2) The sun can be approximated as a blackbody at 5700K. Calculate (a) the wavelength at which its spectral emissive power is at maximum, and (b) the spectral emissive power at this wavelength. Calculate (c) the fraction of the total emitted energy in the visible spectrum (0.40.7m) [note how big of a fraction this represents...], (d) the fraction of the total emitted energy in the infrared spectrum (0.7100m ) [this is pure heat since most surfaces readily absorbs in this wavelength band], and (e) the emitted energy flux in these two wavelength bands