"Generate symbolic visual representations for the effectiveness of one-to-one tutoring based on three hypotheses - tutor-centered, student-centered, and interactive. Use minimal elements and avoid realistic depictions. For the tutor-centered approach, represent the idea of guidance and leadership in the learning process using simple symbols. For the student-centered approach, symbolize active engagement and control of learning. For the interactive approach, depict a dynamic interaction through symbolic elements, emphasizing collaboration and shared learning. Restrict the use of text and focus on creating concise and symbolic images."