Ключевые слова: 20s, 50s, assignment, assistance, book, bookshelf, casual clothing, caucasian, cheerful, college, communication, computer, confident, connection, course, desk, education, electronic, guidance, happy, higher education, indoors, information, knowledge, laptop, learning, library, looking at camera, male, man, mature adult, notebook, notes, professional, sitting, smiling, spectacle, student, studying, teacher professor, university, wireless technology, young adult,