Suppose you invest in a mutual fund at the price of $98/ share. You predict that next year there may be 4 states of the economy and the corresponding prices of the fund in the below table. The T-bill rate is 4%. Calculate the standard deviation of excess returns? Express your answer in percent and round it to 2 decimal places. For example, if your answer is 0.25456 , then please write down 25.46 (without the percent sign)