Hey this was a question from an old test, can you guys help me with this one?

1. (20 points) Multi-level page tables. Assume a virtual address machine with a 32bit address. Assume the address is divided into 4 parts a,b,c,d with the first three parts used to index into a three level page table and the fourth is used to index into the location on the page. Assume the values for a,b.c,d are 4,8,8,12 resulting in a 4kbyte page (3 points) what is the total size in bytes of the page tables for the smallest program, which is a program containing a single page of text and heap, starting at location 0, and another page for the stack, starting at location 0xFFFFFFFF and running downards. Assume all page table entries are 4 byes each (3 points) what is the total size in bytes of the page tables for the largest program, which is a program containing text, heap an stack which fill the entire 32bit address space (4 points) which page table entries are used for address 0x12345678