In the summer of 2015, the exchange rate of China's currency, the yuan, declined against other currencies. The lower value for the yuan was expected to have a negative effect on firms such as Apple and Yum Brands (owners of KFC and Pizza Hut) that have stores or restaurants in China. But the lower value of the yuan was expected to benefit Foxconn, a firm based in Taiwan that assembles iPhones in China. Briefly explain how the decline in the value of the yuan would have a negative effect on firms, such as Apple and Yum, but would benefit other firms, such as Foxconn, that also operate in China.