$8\mathrm{.}73$ The pressure drop at Section $2$ shown in the figure is not to fall below $60$ psi when the flowrate from the tank varies from $0$ to $1f\frac{t^3}{s}(cfs)$ and the branch line is shut off. Determine the minimum height $h$ of the water tank under the assumption that $($a$)$ only major losses included and $($b$)$ both major and minor losses are included. Are minor losses important for this problem?