A single 212-Po nucleus, initially at rest, emits an alpha particle as it decays into a 208-Pb nucleus. There are no other decay products, and the kinetic energy of the alpha particle is measured to be 1.407 × 10^-12 J. What is the total amount of nuclear potential energy, in joules, that was released in this process? What is the difference between the original mass of the 212-Po nucleus and the total mass of the fragments after the decay?