$4\mathrm{.}4\mathrm{.}4.$ An industrial water$-$distribution system is schematically shown in Figure P$4\mathrm{.}4\mathrm{.}4.$ The demands o the system are currently at junctions $D(0\mathrm{.}550\frac{m^3}{sec})$ and $E(0\mathrm{.}450\frac{m^3}{sec}).$ Water enters th system at junction A from a storage tank $($surface elevation of $355\mathrm{.}0m).$ All pipes are concret $)$ with lengths and diameters provided in the table below. In addition, the elevation of the junctions are given in the table below. Calculate the flow rate in each pipe $($initial estimate flows are provided$).$ Also determine if the pressure at each junction exceeds $185$kPa, a require ment of the water company by the industrial park.

Figure P$4\mathrm{.}4\mathrm{.}4$