Use THIESSEN POLYGONS in solving.
Extracted text: Normal Annual Province MuniCity Barangay Eastings (m) Northings (m) Area (m²) Rainfall (mm) Pampanga Mabalacat Dau 13427038.89 1711318.70 1990 90521661.26 Tarlac Concepcion Alfonso 13430011.25 1726735.28 1890 227010594.64 Tarlac Саpas O'Donnell 13409119.2O 1730255.84 1850 172132137.98 What is the total Areal rainfall over the Concepcion watershed evaluated through Thiessen Polygons?