Maria has $ 25,000 to invest in the stock market. The financial analyst recommends that you invest your money in 3 different instruments. Product A has a year-end rate of return of 5%. Product B has a rate of return of 8% and Product C the rate is 10%. She wants to earn $ 1,800.00 in dividends at the end of the year. In addition, you want to invest twice the amount in the safest instrument A, than in the less secure instrument C.