Suppose a U.S. investor wishes to invest in a British firm currently selling for f90 per share. The investor has $36.000 to invest, and the current exchange rate is $2/ Required: a. How many shares can the investor purchase? (Round your answer to the nearest whole number.) b. Fill in the table below for dollar-denominated rates of return after one year in each of the nine scenarios (three possiole share prices denominated in pounds times three possible exchange rates). (Round your percentage answers to 2 decimal places. Negative amounts should be indicated by a minus sign.)