Problem $9$ In order to help the alien Dwayne begins to remove the water and pour it into another large tank. The water flows through a long pipe and has a pressure of $4\mathrm{.}8$ atm at 'ground' level and flows at a speed of $0\mathrm{.}60\frac{m}{s}$ through a pipe $5\mathrm{.}0$ cm in diameter. The pipe taper down to $2\mathrm{.}6$ cm in diameter at the top which is located $20$ meters above the 'ground' level. Calculate the flow velocity and the pressure in such a pipe at the top. Assume no branch pipes and ignore viscosity.