Consider the following variation of table for the U. S. semiconductor market. U.S. Tariff 0% 10% 20% From Canada, before NAFTA $46 $W $55.2 From Asia, before NAFTA $42 $X SY From Canada, after NAFTA $46 $Z $Z From Asia, after NAFTA $42 $X $Y From the United States $47 $47 $47 1. According to the table, W - $ X - $ Y - $ , and Z = $