Class Interval	Frequency
19-21	14
22-24	14
25-27	15
28-30	15
31-33	2

Given the data set, determine the following.

1) P (12th percentile)

2) P (79th percentile)

3) D (6th decile)

4) D (9th decile)

Please provide comprehensive solution. Thank you! I badly need to understand this topic so im hoping for a very thorough explanation.