import pandas as pd df= pd.read_csv('sales.csv',delimiter=',') df['R_Quartile'] = pd.qcut(df['recency'],4,labels=[4,3,2,1]).astype('str') df['F_Quartile'] = pd.qcut(df['frequency'],4,labels=[1,2,3,4]).astype('str') df['M_Quartile'] = pd.qcut(df['monetary'],4,labels=[1,2,3,4]).astype('str') df['RFMC...