Please do these 2 questions correct. Thanks

And give a short explanation of it. How to do these kind of questions in the future.

Thank you very much.

Numerical answer. Pay attention to questions looking similar. The virtual memory (space) of a process P contains 10 pages. The system, using Demand Paging, allocates five frames to Process P. We assume that Process P does not waste memory. Process P generated 1000 page memory references What is the page fault rate? (Answer 1.0 if it cannot be determined with the information provided)