[i][u]Ages of Characters[/u][/i]

Clay: [b]18[/b] 
Mario: [b]17[/b] (going on 18)
Iikka: [b]16[/b] 
Max: [b]15[/b] (going on 16)
Theo: [b]14[/b] (going on 15) 

So what would the grade levels for everyone? Is the below correct?

Clay: [b]Sophomore[/b] 
Mario: [b]Junior[/b]
Iikka: [b]Sophomore[/b] 
Max: [b]Sophomore[/b]
Mario: [b]Freshman[/b]