Chapter $2-$ Flow in pipes

$4.$ What is the difference between HGL and EGL? Which is higher?

$5.$ For the pipe shown below, neglect all minor losses and calculate the velocity of the jet and the discharge in the pipe. Plot the HGL and EGL. Check f on the Moody diagram. $($Problem $2\mathrm{.}1)$

$6.$ The pipe system in the figure below is open to the atmosphere at point $2.$ Calculate the discharge given $f=0\mathrm{.}02$ and $H=30ft.($Problem $2\mathrm{.}9)$