Problem $4$: Water, assumed here to be an ideal fluid with unit weight of $9\mathrm{.}81k\frac{N}{m^3},$ flows around a circular bend

with circular streamlines, constant velocity, and a uniform velocity profile, as depicted below. The vertical

direction is as denoted by the acceleration due to gravity. The pressure at point $1$ is $50$ kPa $.$ What is the pressure at

point $3?$