a$.$ If there are two points A and $B.A$ is located at a distance of $h=5\mathrm{.}50m$ below you and B is located at a distance $h=5\mathrm{.}50m$ above you. Calculate the pressure difference at each of these two points to the pressure at your position.

b$.$ A garden hose has an unobstructed opening with a cross sectional area of $2\mathrm{.}85{10}^{-4}{m}^2.$ It fills a bucket with a volume of $8\mathrm{.}00{10}^{-3}{m}^3$ in $30$ seconds. Find the speed of the water that leaves the hose through $($i$)$ the unobstructed opening and $($ii$)$ an obstructed opening with half as much area.

c$.$ The water tank is open to the atmosphere at the top and bottom opening pipe. Find the speed of the liquid leaving the pipe at the bottom if $h=25cm.$ What principle you use in here?