1. The investigation studies the marketing problems. The marketing problems are studied. 2. The author developed some theoretical models. Some theoretical models were developed.3. We found an approach to the problem. – An approach to the problem was found. 4. The paper considered a number of standard programs. – A number of standard programs were considered. 5. The author has analyzed the material. – The material has been analyzed. 6. The author gives the important data. - The important data is given.