help me understand pls

QUESTION 1 [10 Marks] A dead-weight gauge with a 1cm-diameter piston is used to measure pressures ve accurately. In a particular instance a mass of 6.14kg (including piston and pan) bring it into balance. If the local acceleration of gravity is 9.82m/s2, what is a) the gauge pressure being measured? (767.7kPa) b) the absolute pressure if the barometric pressure is 1atm ? ( 867.4kPa ) (7) (3)