2. You found null values in the following columns. How you will fix each attribute. Ages, groupby class level than, AVG Gpa, groupby univ, gpa Hours Studying, group by gpa, University, then interpolate Favorite course: mode Class level: cut into 5 groups, equals. What kind of problem: 1. Different ages. 2. Cut into 5; they should be not equal. 3. In case of outliers, you can remove the outliers, then cut.