Consider the following five monthly$$ returns:

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$.$

a$.$ Calculate the arithmetic average monthly return over this period.

b$.$ Calculate the geometric average monthly return over this period.

c$.$ Calculate the monthly variance over this period.

d$.$ Calculate the monthly standard deviation over this period. $0\mathrm{.}050\mathrm{.}05$

negative $0\mathrm{.}060\mathrm{.}06$

$0\mathrm{.}040\mathrm{.}04$

$0\mathrm{.}060\mathrm{.}06$

negative $0\mathrm{.}01$