With respect to Lubricating Oils used in Main Engine Sump: A. Briefly describe the causes and effects of bacterial attack on diesel engine lubricating oil. B. Bacterial activity has been detected in the lubricating oil of the main engine fitted in the ship aboard which you are serving as 2ndeng. Write a letter to the owner operator of the ship indicating the action you intend to take and offer suggestion to the avoidance of future incidents..