can you please help me solve this. the answer should be approximatelu 287 Pa

The manometer shown is connected to a chamber of air on the right at unknown pressure P1 and is open to atmospheric pressure air on the left. The manometer contains water of density 1000 kg/m3 and oil of density 600kg/m3. Assume the manometer tubes are wide enough to neglect surface tension effects but narrow enough to neglect height variation across the diameter. Calculate the gage pressure P1 of air in the chamber on the right