The following set of memory requests arrive at the OS in the sequence given below from processes A to D. A: 25 blocks, B: 50 blocks, C: 100 blocks, D: 90 blocks a) Place the processes in the empty partitions shown below using the First-fit algorithm. Write only the process names i.e. A/B/C/D inside the boxes below as appropriate. OS Blocks Empty 50 blocks Empty 15 blocks Empty 100 blocks Empty 95 blocks Empty 250 blocks OS I b) Place the processes in the empty partitions shown below using the Worst-fit algorithm. Write only the process names i.e. A/B/C/D inside the boxes below as appropriate Empty 95 blocks Empty 250 blocks Empty 100 blocks Empty 15 blocks OS Blocks Empty 50 blocks OS