class Mentor { isA Student; position 171 43 109 41; } class Student { position 184 139 109 41; } class Mentor { isA Student; } class Mentor { position 121 82 109 41; } class Student { position 121 214 109 41; } class Mentor { isA Student; position 171 43 109 41; } class Student { position 184 139 109 41; }