HOW to draw IDW & TIN, Contour line in Qgis

CRS CHANGE:
ward boundary vector layer -- Export -- save features as -- CRS EPSG:24380 Kalyanpur -- Add save file to map(off) -- ok
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IDW(Inverse Distance Weighted):
Temperature(shp file) -- Only vector boundary(on) -- processing -- tool box -- interpolation -- IDW Interpolation -- vector layer(temperature) -- Interpolation attribute -- (temperature) -- point -- distance coefficient(2.0000) -- Extent -- calculation from layer -- pixel size -- (x=30,y=30) -- Interpolated -- save to file -- Run.
CLIP Mask layer:
Raster -- Extraction -- clip Raster by mask layer -- Input layer(IDW layer ) -- mask layer --( ) keep resolution of input raster (on) -- clipped( mask) -- output file location -- Run.
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