An investor plans to put a total of $$80,000$ in a money market account, a bond fund, an international stock fund, and a domestic stock fund. She

wants $60\%$ of her investment to be conservative $($money market and bonds$).$ The investor wants the amount in international stocks to

be one$-$fourth the amount in domestic stocks. Finally, the investor needs an annual return of $$3,200.$ Assuming the investor gets annual returns

of $2\mathrm{.}5\%$ on the money market account, $3\mathrm{.}5\%$ on the bond fund, $4\%$ on the international stock fund, and $6\%$ on the domestic stock fund, how

much should the investor put in each investment?