Explain the differences between internal and external fragmentation. What are pages in memory management? What are types of memory management? Consider a logical address space of eight pages of 1024 words, each mapped onto a memory of 32 frames then: a. How many bits are there in logical address? b. How many bits are there in the physical address? Reflect on your third week, in this class, at the graduate level. What went well? What aspects of the unit were challenging for you?