please provide an explanation of how to get the answers. this is very important because I wanna understand it too. Thank you.

https://docs.google.com/document/d/1Rt7-vjIXMNOeuUBSNqrQgO_0t5FLFclK/edit?usp=sharing&ouid=108363730168785409731&rtpof=true&sd=true

Instruction: Choose the letter of your answer among the choices. If your answer Is not among the choices, write E. Please write the letter of your answer before the number. Class No. Class Frequency Class Class cf Interval Boundary,f Marl-t 1 63-67 1 62.5-67.5 65 g 4 2 ~62 9 57.5\"! 60 26 13 3 53 57 8 52.5 - 57.5 55 17 21 4 46-52 g 47.5 - 52.5 9 Z 5 43-47 2 gm 47.5 45 2 30 1 a. 3 b. 4 c. 5 d. 6 2 a. 4 b. 10 o. 20 d. 30 3. a. 55 b. 56 c. 58 d. 59 4. a. 52.5 b. 60.5 c. 62.5 d. 63.5 5. a. 7 b. 6 c. 5 d. 3 6. a. 49 b. 50 c. 52 d. 54 7. a. 27 b. 28 o. 29 d. 30 3. a. 40.5 b. 41.5 c. 42.5 d. 47.5 9. is the mean of the given. a. 56 b. 59 c. 56.25 d. 57.25 10-11. The locator of the median class. a. 15 b. 17 o. 20 d. 30 12. What is the less than Cumulative frequency before the median class? a. 9 b. 15 c. 17 d. 20 13. The frequency of the median class is a. 4 b. 7 o. 3 d. 9 14. What is the lower boundary of the median class? a. 47.5 b. 52.5 c. 57.5 d. 62.5 15-16. The median of this grouped data is . a. 51.25 b. 52.25 c. 56.75 d. 57.25 17. The frequency of the modal class is a. 6 b. 7 o. 8 d. 9 18. What is the frequency before the modal class? a. 6 b. 7 c. 8 d. 9 19-20. The mode is . a. 56 b. 56.25 c. 57.25 d. 62.67