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Consider a 2D triangular element with the three vertices at 1[1,1], 2[1,2] and 3[2,2]. the displacements at these t hree points are [0.1,0.1], [0.3,0.2] and [0.4, 0.3] mm for point 1,2,and 3 respectively
1. determine the linear interpolation function of the displacement
2. calculate the interpolated displacement at [1.2, 1.4] and [1.5, 1.8] respectively