$7\mathrm{.}30$ For the completed flow net below:

a$)$ Compute the flow under the dam per meter of dam if the coefficient of permeability is $4\mathrm{.}2$

$x{10}^{-2}c\frac{m}{s}.$

b$)$ Find the exit hydraulic gradient.

c$)$ Find the Total, Pressure, and Elevation Head at points A$,$ B$,$ C$,$ and D$.$ Assume the Datum

at the bottom of the flow net.