Centrifugal Pumps and Cavitation

At an irrigation pumping site, atmospheric pressure head is $P_a / \gamma = 10.3\text{ m}$, water vapor pressure head is $P_v / \gamma = 0.3\text{ m}$, static suction lift is $h_s = 4.0\text{ m}$, and friction head loss in suction pipe is $h_{fs} = 1.0\text{ m}$. The net positive suction head available ($NPSH_A$) in meters is: