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At a distance of 1 AU from the Sun, the solar wind has a proton density...

At a distance of 1 AU from the Sun, the solar wind has a proton density of 10 cm^{-3}, traveling at a speed of 400 km / s. (i) estimate the mass loss rate of the Sun in g/s and solar masses per year; ii) estimate the luminosity lost by this process, comparing it with the photon luminosity.

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