Given the following information about the possible returns from an investment.

Return $(\%)$ Probabilities

$12\%0\mathrm{.}15$

$9\%0\mathrm{.}60$

$6\%0\mathrm{.}25$

Calculate the:

expected return,

variance of the return,

standard deviation of the return, and

probability that the return is less than or equal to $8\%.$