Part Ill: Main Memory Allocation Techniques (15 points): 1. Why is fragmentation a serious concern for multiprogramming with variable partitions 2. In a virtual memory approach, a program needs a new page, but there are no available 3. In a fixed partition approach, a 12 KiB program is ready to be loaded, but the only 4. In a variable partition approach, a 12 KiB program is ready to be loaded, but the only but it is not an issue for multiprogramming with virtual memory? frames. What happens? available partitions are 4 KiB and 8 KiB. what happens? available partitions 4 KiB, 6 KiB and 8 KiB. What happens