Using the table below, calculate the Standard Deviation of the portfolio:

Demand for Company Products Probability of this Demand Occurring Rate of Return if this demand Occurs $($k$)$

Weak $0\mathrm{.}15$

$-30\%$

Below average $0\mathrm{.}25-15\%$

Average $0\mathrm{.}2510\%$

Above Average $0\mathrm{.}2025\%$

Strong $0\mathrm{.}1545\%$

Question $4$Answer

a$.$

$7\mathrm{.}00\%$

b$.$

$24\mathrm{.}68\%$

c$.$

$7\mathrm{.}50\%$

d$.$

$22\mathrm{.}05\%$