The following table presents forecasted returns for three companies under various potential states of the economy: State Probability Stock X Stock Y Stock z Above Average 10% 35.7% 27.6% 43.2% Average 45% 15.5% 6.3% 12.6% Below Average 30% -1.2% -4.0% -7.0% Recession 15% -10.6% -6.0% -19.2% Weight 55% 30% 15% What is the standard deviation on a portfolio of these three companies constructed according to the weights given in the table? (Report answer in percentage terms and round to 2 decimal places. Do not round intermediate calculations)