In a coding system, 'FISH' is represented as '614891'. If 'F' is 6, 'I' is 9, 'S' is 19, and 'H' is 8, what is the code for 'BIRD' where 'B' is 2, 'I' is 9, 'R' is 18, and 'D' is 4?
In a class of students, John is smarter than Mike but not as smart as Sarah. Tom is smarter than Sarah but not as smart as Lisa. Who is the smartest student in the class?