Can you answer the question by python? I wanna all steps, please.

Exercise 4. Gravitational potential energy Three 5 kg masses are arrange to form an equilateral triangle with sides 30 cm. Find the gravitational potential energy of this arrangement of masses. What is the magnitude of the change in potential energy if the mass at the apex of the triangle is moved to be directly above one of the other two masses to form a right-angled isosceles triangle with two sides of length 30 cm? (ans -1.67e-08 , 1.63e-09 J)