A private investment pool contains $570,000, all of which is to be invested, in three kinds of securities. The kinds are common socks, expected to yield 2.0% per year, U.S. Treasuries, expected to yield 0.8 % per year, and municipal bonds, expected to yield 1.1% per year. The amount in stocks is to be equal to twice the sum of the amounts in the other two categories. The return on the total amount is to be 1.6 %.
After carefully defining your letter variables, write (but do not solve) the equations that determine how much is to be invested in each category.
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