assignments should be. To be time efficient, all five printing jobs will be done simultaneously. (a) How could a quantitative approach to decision making be used to solve this problem? A quantitative approach to decision making can provide a systematic way for deciding the job-machine pairings so that total job processing time is minimized. A quantitative approach to decision making can provide a systematic way for deciding which inputs are controllable and which are uncontrollable. (b) What would be the uncontrollable inputs for which data must be collected? (Select all that apply.) when to start each printing job whether or not to run all five printing jobs at the same time how long it takes to process each job on each machine any job-machine pairings that are unacceptable what printing job to assign to each machine (c) Define the decision variables to appear in the mathematical model. one for each job-machine pairing, taking on a value corresponding to the amount of time taken to perform the job on the given machine one for each job, taking on a value corresponding to the average amount of time taken to perform the job one for each machine, taking on a value of 1 if the machine is used and 0 othervise one for each machine, taking on a value corresponding to the average amount of time the machine takes to perform a job one for each job-machine pairing, taking on a value of 1 if the pairing is used and 0 otherwise Define the objective function to appear in the mathematical model. minimize the number of jobs done on each machine maximize the number of daily printing jobs minimize total job processing time minimize the total number of machines used maximize Zipco's daily profit Define the constraints to appear in the mathematical model. (Select all that apply.) l each job is assigned to exactly one machine at least two machines are used only one machine is running at any given time each machine is assigned no more than one job no more than four machines are used (d) Is the model deterministic or stochastic? deterministic stochastic (e) Which of the following are reasonable simplifying assumptions for this problem? (Select all that apply.) Assume that all job-machine pairing processing times are equal. Assume that any job can be performed by any machine. Assume that job-machine pairing processing times are deterministic. Assume that each machine can perform multiple jobs at a time. Assume that job-machine pairing processing times are probabilistic