You have been given this probability distribution for the holding$-$period return for BCE Inc. stock:

Stock of the Economy Probability HPR

Boom $0\mathrm{.}3018\%$

Normal growth $0\mathrm{.}5010\%$

Recession $0\mathrm{.}20-5\%$

What is the expected standard deviation for BCE Inc. stock?

Multiple Choice

$6\mathrm{.}91\%$

$7\mathrm{.}99\%$

$7\mathrm{.}79\%$

$7\mathrm{.}25\%$

$8\mathrm{.}85\%$