A mining company has three mines. One day of operation at mine produces the following output. Mine #1: 25 tons of copper, 600 kilograms of silver and 15 tons of iron, Mine #2: 30 tons of copper, 500 kilograms of silver and 10 tons of iron, Mine #3: 20 tons of copper, 550 kilograms of silver and 12 tons of iron, Suppose the company has ordered 550 tons of copper, 11350 kilograms of silver, and 250 tons of iron. (a) Write a vector equation (Az = b) whose solution gives the number of days each mine should operate in order to exactly fill the orders? ab sin (a) P 21 x2 *3 8 di = f (b) What is the solution to the vector equation? 00 a 82 ? x1 12 #3 ab sin (a) 8 dr f 00 Q 52