Technician a says that one advantage of hydraulics compared to a mechanical linkage is that fluid has no fixed shape. technician b says that hydraulics offer the opportunity to multiply the input force. which technician is correct

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Technician a says that with self-adjusting clutch systems, the release bearing constantly rotates. technician b says that the ball bearing portion of the release bearing should be lubricated with high-temperature grease during routine maintenance. which technician is correct?