$[20$ pts$]$ If the pressure difference between points $1$ and $2$ in Figure $5$ is $24$ psi, what is the flowrate? The pipes are galvanized iron with $k_s=0\mathrm{.}0006ft.$ Take $v=1\mathrm{.}06{10}^{-5}f\frac{t^2}{s}$ and neglect minor losses. Hint: As a first approximation, estimate friction factors in the Moody Diagram $($or Colebrook$-$White formula$)$ based on the assumption that flow is in the fully turbulent regime. After you obtain a flowrate estimate, calculate the Reynolds number and determine new friction coefficients for each section, as needed. If the friction coefficient is more than $1\%$ different than the initial value, repeat your calculations. Iterate until your friction coefficient changes less than $1\%$