$1.$A horizontal $65-mm-$diameter galvanized iron pipe, having a roughness of $=0\mathrm{.}2mm,$ is used to transport water at a temperature of $60C$ and with a velocity of $3\frac{m}{s}.$ Determine the pressure drop over its $12-m$ length. $v=0\mathrm{.}478({10}^{-6})\frac{m^2}{s}$ and $=983\mathrm{.}2k\frac{g}{m^3}.$

$4.$

The $100-mm-$diameter commercial steel pipe discharges $0\mathrm{.}030\frac{m^3}{s}$ of water at $25C$ through the $40-mm$ diameter nozzle at $B.$ Determine the pressure at $A.$ The minor head loss coefficient for the nozzle is $K_L=0\mathrm{.}15.$

Please solve both with steps for rate