Assuming the following files are going to be stored on the disk. Given that the total free disk space is 25 blocks, depict and briefly explain how the OS allocate the disk space in the following scenario: File name F1 F2 F3 F4 File Size (in blocks) 6 5 7 4 (a) All the free disk blocks are located contiguously and the OS is using contiguous allocation. (b) The free disk space are separated in 2 contiguous groups: 12 blocks and 13 blocks; the OS is using linked allocation. (c) The free disk space are separated in 3 contiguous groups: 4 blocks, 10 blocks, and 11 blocks; the OS is using indexed allocation. Activ (20 marks) to