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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def rotate_x(self, deg):
 """Rotate mesh around x-axis :param float deg: Rotation angle (degree) :return: """

        rad = math.radians(deg)
        mat = numpy.array([
            [1, 0, 0, 0],
            [0, math.cos(rad), math.sin(rad), 0],
            [0, -math.sin(rad), math.cos(rad), 0],
            [0, 0, 0, 1]
        ])
        self.vectors = self.vectors.dot(mat)
        return self