Ключевые слова: adult, annoyed, background, beard, boy, brain, business, busy, caucasian, classroom, clock, deadline, education, employee, expression, face, fatigue, frustration, guy, headache, home, hours, job, late, learn, male, man, migraine, mind, overwhelmed, pain, paper, people, person, pressure, problem, project, sad, schedule, stress, student, study, teenager, time, tired, unhappy, upset, white, work, young,