g = X^top * (h-y) * frac{1}{m} = begin{pmatrix} 1 & 1 & 1 & 1\ 5.1 & 4.9 & 7.7 & 6.3\ 3.5 & 3.0 & 2.8 & 2.7\ 1.4 & 1.4 & 6.7 & 4.9\ 0.2 & 0.2 & 2.0 & 1.8\ end{pmatrix} * begin{pmatrix} 0 \ 0 \ 1 \ 1 \ end{pmatrix} * frac{1}{4} = begin{pmatrix} 2 \ 14 \ 5.5 \ 11.6 \ 3.8 \ end{pmatrix} * frac{1}{4} = begin{pmatrix} 0.5 \ 3.5 \ 1.375 \ 2.9 \ 0.95 \ end{pmatrix}

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