6. Sometimes an isoparametric map is used for tringle elements. In that case, the reference element is: 2 1 3 1 As compare to the real element, which is: 2 (X2,y2) y 3 (X3,y3) 1 (X1,y¡) For this case, please find the map between the real and the reference elements and the shape functions for the reference element.

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