https://nptel.ac.in/courses/106108101/pdf/Worked_Out_Problems/Mod_4.pdf
yes, understood:)
Try from example given here https://edurev.in/studytube/Memory-Management-P-C-P--Bhatt/748662c6-495a-490e-a586-22b77e63da30_p
See u got it or not :)