A tube that is open to the atmosphere contains a column of liquid with $SG=2\mathrm{.}5$ as indicated on the diagram. The diameter of the tube is $D=0\mathrm{.}010m.$ If the absolute pressure at the bottom of the column of liquid is $P_{\frac{?}{abs}}=120$kPa, what is:

a$)$ The mass of the weight placed on the liquid level?

b$)$ The reading on the pressure gauge placed at the position as indicated on the diagram

You may assume that the local atmospheric pressure is $P_{\text{a}\text{t}\text{m}}=87$kPa.