Can anyone answer this difficult physics problem?

Question

Given: Atmospheric pressure is 101300 Pa. The density of water is 1000 kg/m^3. The viscosity of water is negligible.
Water flows at speed of 4.3 m/s through a horizontal pipe of diameter 3.4cm. The gauge pressure P1 of the water in the pipe is 1.8 atm. A short segment of the pipe is constricted to a smaller diameter of 2 cm.

What is the gauge pressure of the water flowing through the constricted segment? Answer in units of atm.


Whoever figures this question out first will get the best answer. Thanks!

Answer 1

Use Bernoulli's equation. You can assume that the z's cancels out.