A computer has 32-bit virtual addresses and the page size is 2^3 KB. Suppose the text, data, and stack segments of a process need 5 page(s) each. If the computer uses two-level page tables, with 2 bits for the second-level index, how many second-level page tables are needed to cover the text, data, and stack segments of the process? Note that the text and data segments are contiguous in the process's address space, but the stack is at the other end of the address space.