(8-58) (a) Suppose we have three masses, m1,m2, and m3, that initially are infinitely far apart fro

(8-58) (a) Suppose we have three masses, m1,m2, and m3, that initially are infinitely far apart from each other. Show that the work needed to bring them to the positions shown in Fig. 8-39 is W=−G(m_1m_2/r_12+m_1m_3/r_13+m_2m_3/r_23) (b) Can we say that this formula also gives the potential energy of the system, or the potential energy of one or two of the objects? (c) Is W equal to the binding energy of the system—that is, equal to the energy required to separate the components by an infinite distance? Explain.