1. Suppose a program has 18 instructions. It has been loaded into the RAM at memory address 1234ABCD. a. What is the logical address of the last instruction? ces b. What is the physical address of the last instruction? 1. 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 OS Blocks Empty 50 blocks Empty 15 Mocks Empty 100 blocks Empty 95 blocks Empty 250 blocks OS