Inward radial flow occurs between two horizontal discs $0\mathrm{.}6$ m in diameter and $75$ mm apart, the water leaving through a central pipe $150$ mm in diameter in the lower disc at the rate of $0\mathrm{.}17$ m$^3/$s$.$ If the absolute pressure at the outer edge of the disc is $101$ KN$/$m$^2,$ calculate the pressure at the outlet. Find also the resultant force on the upper disc.