Experts can you do this

Dear Student
6. a)
Marks Cf Frequency II III IV V VI
15 10 10 30   60    
30 30 20 50 74  
45 60 30 54 60
60 84 24 30 40
75 90 6 16  
90 100 10      
    100          

Analysis Table
Columns 15 30 45 60 75 90
I     P      
II     P P    
III   P P      
IV P P P      
V   P P P    
VI     P P P  
  1 3 6 3 1 0

Mode = 45

Regards

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