Joe Martinez a US citizen living in Brownsville Texas invested in the common stock of Telmex a Mexican corporation. He purchased 5,000 shares at 16.50 pesos per share. Twelve months later he sold them at 20.75 pesos per share. he received no dividends during that time. a: what was Joe's investment return (in percentage terms) for the year on the basis of the peso value of the shares? b: the exchange rate for pesos was 8.58 pesos per US$1.00 at the time of the purchase. At the time of the sale the exchange rate was 9.10 pesos per US$1.00. Translate the purchase and sale prices into US$. c: calculate Joe's investment return on the basis of the US$ value of the shares. d: explain why the two returns are different. Which one is more important to Joe? Why?