A stock will provide a rate of return of either 20% or +30%.

a.	If both possibilities are equally likely, calculate the expected return and standard deviation. (Do not round intermediate calculations. Round your answers to 1 decimal place.)

Expected return	%
Standard deviation	%

b.	If Treasury bills yield 5% and investors believe that the stock offers a satisfactory expected return, what must the market risk of the stock be?

Market risk	%