Suppose Wesley Publishing's stock has a volatility of

65 %

while Addison Printing's stock has a volatility of

30 %

If the correlation between these stocks is

15 %

what is the volatility of the following portfolios of Addison and Wesley:

a.

100 %

Addison

b.

75 %

Addison and

25 %

Wesley

c.

50 %

Addison and

50 %

Wesley