Ключевые слова: analyze, background, business, businessman, chalk, change, chart, circle, concept, consultant, curve, cycle, develop, draw, education, graphic, growth, hand, introduction, life, line, loop, man, management, manager, market, marketing, mature, maturity, office, period, phase, pointing, presentation, product, progress, sale, saturate, school, show, stage, step, strategy, system, teach, teacher, write,