Three assets have had the following rates of return during the last five years.

$\backslash$table$[[$Year$,$Stock B$,$Stock $V,$Stock U$],[1,0\mathrm{.}08,0\mathrm{.}06,0\mathrm{.}06],[2,0\mathrm{.}05,-0\mathrm{.}03,0\mathrm{.}18],[3,-0\mathrm{.}04,0\mathrm{.}06,-0\mathrm{.}02],[4,0\mathrm{.}01,0\mathrm{.}01,0\mathrm{.}02],[5,0\mathrm{.}03,0\mathrm{.}07,-0\mathrm{.}06]]$

Which is the better investment, based on the arithmetic mean?

Which is the better investment, based solely on the risk of the assets' returns?

Which is the better investment, based on the returns' relative variability?

Which is the better investment, based on the geometric mean?