Wells and Pumps

A centrifugal pump is installed where atmospheric pressure head is $10.0\text{ m}$ of water and the saturated vapour pressure head of water at operating temperature is $0.30\text{ m}$. The static suction lift is $h_s = 3.5\text{ m}$ and friction head loss in the suction pipe is $h_{fs} = 1.2\text{ m}$. The Net Positive Suction Head Available ($NPSH_a = H_{atm} - H_v - h_s - h_{fs}$) in metres is ________ (answer in integer).