Task 3. (15 points) At the quality control department of an oil refinery, Engineer Pavel Pavlovich received a research object consisting of about 100 oil samples (a container designed for 100 samples, which was almost completely filled). Each sample has certain characteristics in terms of sulfur content - either low-sulfur or high-sulfur, and density - either light or heavy. The relative frequency (statistical probability) that a randomly selected sample will be a heavy oil sample is $\frac{1}{7}$. The relative frequency that a randomly selected sample will be a light low-sulfur oil sample is $\frac{9}{14}$. How many high-sulfur oil samples does the object contain, if there were no low-sulfur samples among the heavy oil samples?