Write a function LeastSquareFit3Pol that solves a linear system of equations to find a least squares fit
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Write a function LeastSquareFit3Pol that solves a linear system of equations to find a least squares fit of a third order polynomial f (x) = a3x3 + a2x2 + aix + ao.r to an experimental data set given as two row arrays. The function LeastSquareFit3Pol must explicitly solve a set of linear equations and cannot use polyfit. For example:
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