Synchronization of cooperating processes can be accomplished by a variety of busy waiting solutions, semaphores, monitors, and message passing. Busy waiting is extremely wasteful of resources, so synchronization is generally implemented with semaphores, monitors or message passing. Describe the advantages and disadvantages of each of the three methods. Also indicate the limitations of each method's applicability (e.g., you would not be able to apply monitors if the programming language that you must use does not have support for monitors).