4. (10) An old manometer containing unknown liquid is intended to be reused. You are asked to examine it with a calibrated Boudon gauge. In a test shown as in the schematic diagram, the Boudon gauge reads 0.6kg/cm2. What is the specific gravity of the fluid inside the manometer? What is the maximum pressure (in psi) that this manometer can measure. (Note: 1kgr represents the gravitational force of 1kg mass.)