Below is the code for openO system call in the user program. open: push dword mode push dword flags push dword path mov push eax int eax, 5 80h 1. What is the purpose of the first threeinstructions (push)? 2. What is the significance of number 5? 3. What is the use of 80h? 4. Where will register eax be used? 5. How will register eax be used? 6. How does instruction int affect the mode? 7. What is the problem caused by the instruction int for VMM? 8. Why is the TLB entries not useful when the OS memory is virtualized