Let's assume a system has 64 bytes of physical memory, 4 byte pages, and 16-byte virtual address spaces. The page table includes the following information: first column is the valid/invalid bit (invalid = 1), the second is the physical frame number. [@] 00 [1] 0 6 [2] 1 10 [3] 02 What range(s) of virtual addresses are valid? [O...15] [0...7] and [12...15] [0...39] and [43...63]