A closed manometer is connected to a tank as shown above. The pressure, $P2,$ at the top of the manometer is $2$ psig.

Given:

The manometer fluid $($shown yellow$)$ has a specific gravity of $12\mathrm{.}6$

The tank fluid $($shown blue$)$ has a specific gravity of $0\mathrm{.}85$

The density of water is $62\mathrm{.}4lb\frac{m}{f}t3$

The section heights are: $L2=10\mathrm{.}5ft$;$L3=13\mathrm{.}5ft$;$L1=18\mathrm{.}5ft$

The weight of any gas in either the tank or manometer tube can be neglected

What is the pressure, $P1,$ at the top of the tank, psig?

What is the pressure at the bottom of the tank, psig $($this is at the bottom of section $L2)?$

What is the pressure at the bottom of the manometer, psig $($this is at the bottom of section L$1)?$

What is the pressure at the bottom of section $L3,$ psig $?$