There are four more students in grade two than in grade one.
The number of students in grade one is divisible by 5.
The number of students in grade three is 2 less than that in grade one.
The number of students in grade one is divisible by 7.
The number of first-year students is divisible by 5 and 7, which is a multiple of 35, ranging from 1 10 to 150.
Number of first-year students 140.
The number of sophomores is 140*60%+4=88.
The number of students in grade three is 140*5/7-2=98.
There are 88 students in the second grade of this school.
There are 98 students in the third grade of this school.