import pandas as pd df=pd.read_csv('sales.csv') R=pd.qcut(df['recency'],[0,0.25,0.5,0.75,1],['4','3','2','1']).astype(str) F=pd.qcut(df['frequency'],[0,0.25,0.5,0.75,1],['1','2','3','4']).astype(str) M=pd.qcut(df['monetary'],[0,0.25,0.5,0.75,1],['1','2','3','4']).astype(str) df['RFMClass']=R+F+M pri...