the fancy french perfume company recently had its secret formula divulged. it turned out that it was using, as the three ingredients, rose oil, oil of fermented prunes, and alcohol. moreover, each 20-ounce econo-size bottle contained 7 more ounces of alcohol than oil of fermented prunes, while the amount of alcohol was equal to the combined volume of the other two ingredients. how much of each ingredient did the company use in an econo-size bottle?