4. Some Euro coins are made from an alloy called Nordic gold, which is 89% copper, 5% aluminum, 5% zinc, and 1% tin. Information on three of these Euro coins is shown in the table below (the symbol for euro is , and is used in much the same way that we use the $ symbol in the United States). Value Mass (in grams) 0.10 4.10 0.20 5.74 0.50 7.80 (a) What is the total mass of zinc contained in a 0.50 coin? (b) Suppose you have 3.20, all made up of 0.20 coins. What is the total mass of copper contained in these coins? (c) Suppose that the market value of copper is $3.00 per pound. How many 0.50 coins would you need to melt down in order to collect $10.00 worth of copper? If each Euro (1.00) is worth $1.36, would this be a profitable method for producing copper?