$1-$Develop a disk scheduling system implementing disk scheduling algorithms, such as$,$ FCFS$,$ SSTF$,$SCAN, C$-$SCAN, C$-$LOOK and calculate the seek time for the selected input request string by a selected algorithm. On executing the program the following workflow is required: i$)$ Program should prompt for algorithm selection. ii$)$ Once algorithm has been selected by the user. In the next step the program should prompt for the necessary inputs needed by the algorithm. iii$)$ The program should then show the total head movements required to execute all requests as output. $2-$Develop a scheduling system implementing algorithms such as$,$ FCFS$,$ SJF$,$ SRTF and Priority scheduling. On executing of the program the following workflow is required: i$)$ Program should prompt for algorithm selection. ii$)$ Once algorithm has been selected by the user. In the next step the program should prompt for the necessary inputs needed by the algorithm $($like process string, time interval etc.$).$ iii$)$ The program should then show the waiting time of individual processes and average waiting time as output. $3-$Problem: Implement a simple file system that simulates how files are stored, retrieved, and deleted. Requirements: i$)$ Create a basic directory structure. ii$)$ Implement functions to create, read, write, and delete files. iii$)$ Manage free space and handle cases of fragmentation.