Required: Suppose a U.S. investor wishes to invest in a British firm currently selling for 34 per share. The investor has $6,800 to invest, and the exchange rates at $1.70/,$2/, and $2.30/ after 1 yeat. Calculate the standard deviation of both the pound-and dollar-denominated rates of return if each of the nine outcomes (three possible prices per share in pounds times three possible exchange rotes) is equally likely. (Do not round intermediate calculations. Round your percentage answers to 2 decimal places.)