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Exercise 1: Assembly line balancing Given the following precedence graph (and task operation times in minutes): Assume that 18 items of this product have to be produced within 3 hours. a) Calculate the cycle time. b) Calculate a lower bound for the number of stations. c) Calculate an upper bound for the number of stations. d) Assign task to stations using the position value. e) Calculate the system's efficiency. Exercise 1: Assembly line balancing Given the following precedence graph (and task operation times in minutes): Assume that 18 items of this product have to be produced within 3 hours. a) Calculate the cycle time. b) Calculate a lower bound for the number of stations. c) Calculate an upper bound for the number of stations. d) Assign task to stations using the position value. e) Calculate the system's efficiency