An operating system (OS) uses paged virtual memory management. Select all of the following statements that are true. Incorrect selections gain negative marks. Select one or more: 1. Several pages are placed in each frame. 2. A 'frame' refers to a sequence of addresses in the actual memory of the computer. 3. It is possible for two different processes to both be allocated the same frame F. 4. The use of fixed size pages helps to eliminate internal memory fragmentation, but some external fragmentation still remains. 5. For a process to run, not all of its pages need to have a (memory) frame