Sharing procedures and data can reduce the main memory demands of jobs, thus enabling a higher level of multiprogramming. Indicate how a sharing mechanism might be implemented for each of the following schemes. If you feel that sharing is appropriate for certain schemes, say so and explain why. You should answer given schemes:

1. fixed-partition multiprogramming with absolute translation and loading.
2. fixed-partition multiprogramming with relocatable translation and loading.
3. variable-partition multiprogramming.
4. multiprogramming in a swapping system that enables two jobs to reside in main memory at once, but that multiprogram more than two jobs.