Horizontal thrust on a symmetric splash shield

A horizontal water jet of diameter $0.0550\,\mathrm m$ strikes the centre of a fixed vertical splash shield at $12.0\,\mathrm{m/s}$. The shield turns the water into equal upward and downward sheets parallel to the shield, with negligible horizontal exit velocity. The jet and sheets are all exposed to atmosphere. Find incident mass flow rate and horizontal force of water on the shield for density $1000\,\mathrm{kg/m^3}$.