You have following information:

 

Risk free return = 12%

 

Stock market index return = 15%

 

Standard deviation of market = 3%

 

You would like to construct an efficient portfolio with 14% return.

The amount to be invested for market portfolio is either  66.67% 83.33% 16.67% 33.33% and the amount to be invested in government bonds is either 66.67% 83.33% 16.67% 33.33% .

The standard deviation of your efficient portfolio is either  2% 2.45% 1.9% 2.5% .