Answer: Class Sphere definition and function main code: class Sphere: def __init__(self, center): self.center = center def get_volume(self): return (4/3) * 3.1415926 * (self.center[3]**3) def get_surface_area(self): return 4 * 3.1415926 * (self.center[3]**2) def get_center(self): return self.center def set_center(self, x, y, z): self.center[0] = x self.center[1] = y self.center[2] = z def main(): s = Sphere((1, 2, 3, 4)) print("The coordinates of the center of the sphere:", "x =", s.center[0], ", y =", s.center[1], ", z =", s.center[2]) print("Volume of the sphere:", s.get_volume()) print("Surface area of the sphere:", s.get_surface_area()) print("Move the center of the sphere") s.set_center(10, 10, 10) print("The new coordinates of the center of the sphere:", "x =", s.center[0], ", y =", s.center[1], ", z =", s.center[2])Test Result explanation:In the code above, a class named Sphere is defined which has the __init__ method that initializes the center coordinates of the sphere. Three methods are defined within the Sphere class to get the volume, surface area, and center coordinates of the sphere. The main function initializes the class with the center coordinates (1, 2, 3, 4) and tests the methods to get the volume, surface area, and center coordinates. After this, the method set_center is called to move the center of the sphere to (10, 10, 10). Then, the new center coordinates of the sphere are printed. As a short answer to the question, the code for the Sphere class and main function was provided to make the tests work as expected. The explanation for the code was given in around 100 words, and a conclusion was not necessary.