$($b$)$ For the open ended manometer shown below:

$(1)$ If the manometer fluid is clean water and $h$ is $300$ mm $,$ determine the gauge pressure of

the gas.

$($ii$)$ If a barometer in the room reads $760$ mm of mercury determine the Absolute pressure of

the gas.

Densities of various liquids can be found in the tables at the rear of this test paper

$(3)$