Comprehension Passage
The line graphs represent the total enrollments (Beginners + Intermediate + Advanced) in an online learning platform over four months of a year.

Note - The number of enrollments in Advanced Level on each day is 1/5th of the number of enrollments in Intermediate Level passengers on the same day, and the number of enrollments in Beginners Level in January, February, March and April is 40%, 60%, 55% and 60% respectively of the total passengers.
The average duration for which enrollments in Advanced Level are made in January, February, March and April is 5 months, 4 months, 6 months and 7 months respectively. Find the average duration of all Advanced Level enrollments in all months together.
1
4.52 months
2
6.32 months
3
5.57 months
4
5.20 months
5
4.36 months