20-25. The frequency table shows the scores in a filipino composition obtained by first year Bayani Class.

20. Find the class interval?
A. 1
B. 5
C. 9
D. 12

21. Find the upper class limit and lower class limit of the third class.
A. Upper class limit=49, lower class limit=40
B. Upper class limit=59, lower class limit=50
C. Upper class limit=69, lower class limit=60
D. Upper class limit=79, lower class limit=70

22. Find the class mark of the fourth class
A. 44.5
B. 54.5
C. 64.5
D. 74.5

23.
A. 1
B. 2
C. 3
D. 5

24. Find the upper class boundary and lower class boundary of the sixth class
A. upper class boundary=39.5, lower class boundary=29.5
B. upper class boundary=59.5, lower class boundary=49.5
C. upper class boundary=79.5, lower class boundary=69.5
D. upper class boundary=79.5, lower class boundary=89.5

25. Which class interval has the most number of students?
A.80-89
B.70-79
C.60-69
D.50-59

Pls answer it correctly. I need it now.​