Question $2.$ A vertical pipe, $1\mathrm{.}8$ m in diameter and $22$ m in length, has a pressure

head at the upper end of $5\mathrm{.}6$ m of water. When the flow of water through it is such

that the mean velocity is $5$ m$/$s$,$ and the friction head loss is $1\mathrm{.}15$ m$.$ Find the

pressure head at the lower end of the pipe when the flow is upward.