A program is being written by a team of programmers. One programmer is implementing a class called Employee; another programmer is writing code that will use the Employee class. Which of the following aspects of the public methods and fields of the Employee class does not need to be known by both programmers? O The method names O The number and types of the method parameters. O the method's return types O How the methods are implemented.

51. Prepare a datafile for the ADJUST program to solve the following horizontal network. 4323.793 4148 349 4558.156 Az90d 3086.928 R 6983.374, 0.000 2165 823 287.737

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Please refer to this textbook: “A. Silberschatz, P. B. Galvin and G. Gagne, “Operating System Principles,”7th Edition, John Wiley & Sons Inc., 2006.”   And answer the following questions: Question: Which mutual exclusion algorithm requires, on average, the fewest messages in a group of 100 machines? centralized. Token-ring. Lamport' s . Ricart & Agrawala