Five batch jobs, a through e, arrive at a computer center at essentially the same time. they have an estimated running time of 15, 9, 3, 6, and 12 minutes, respectively. their (externally defined) priorities are 6, 3, 7, 9, and 4, respectively, with a lower value corresponding to a higher priority. for each of the following scheduling algorithms, determine the turnaround time for each process and the average turnaround for all jobs. ignore process switching overhead. explain how you arrived at your answers. in the last three cases, assume that only one job at a time runs until it finishes and that all jobs are completely processor bound. a. round robin with a time quantum of 1 minute b. priority scheduling c. fcfs (run in order 15, 9, 3, 6, and 12) d. shortest job first

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Design a class tictactoe that: holds the following information about the game: two-dimensional array (3 by 3), and winner. add additional variables as needed. includes the functions to perform the various operations on objects. for example, function to print the board, getting the move, checking if move is valid, determining if there is a winner after each move. add additional operations as needed. includes constructor(s). write the functions of the class, and write a program that uses the class. the program should declare an object of type tictactoe. the program will create the board and store it in the array. the program will allow two players to play the tic-tac-toe game. after every valid move update the array, check if there is a winner. if there is no winner and no tie, then print the board again to continue.

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