Virtual Addressing Consider a virtual memory system with an 16 GByte virtual address space and 128 MByte of physical memory (DRAM). Pages are each 4 Kbytes long and page table entries are each 1 word long (32 bits). a) If a one-level page table is used, what percentage of physical memory is devoted to the page table? b) If a two-level page table is used, what percentage of physical memory is devoted to the segment table