In the virtual memory; a$)$ By consideration for the multiprogramming, how we an archive to the Creating Virtual Spaces Dynamically $($Examine technologies that have been used to create dynamic virtual memory systems. consider three examples, explain in details$)?$ a$)$ What is the relationship Between Virtual Memory and Caching? b$)$ How can a cache be engineered to avoid the problem of ambiguity that occurs when multiple processes use the same range of addresses? $($Please explain in details$)$