A sealed tank has a liquid with a specific gravity of $0\mathrm{.}85$ in it$.$ The pressure in its vapor space is $4$ psi. If the height of the liquid is $10ft,$ how much head pressure, $($in psig$)$ will it exert $q,$

A open tank has a liquid column height of $12ft.$ The bottom pressure tap is located $3ft$ from the bottom of the vessel. The specific gravity of the material is $0\mathrm{.}75.$ What's the head pressure exerted at the lower pressure tap $($in psig$)q,$