Object A, mass \(4.24 \times 10^{5} \mathrm{~kg}\), is at rest in reference frame \(\mathrm{A}\), and object \(\mathrm{B}\), mass \(7.71 \times 10^{4} \mathrm{~kg}\), moves at \(0.875 c_{0}\) in this reference frame.

(a) What does an observer at rest in A measure for the momentum of B?

(b) What does an observer at rest with respect to object B measure for the momentum of \(A\) ?

(c) A reference frame C moves at \(0.300 c_{0}\) relative to reference frame \(A\) and moves in the same direction as object \(\mathrm{B}\). What are the momenta of objects \(A\) and \(B\) as measured by an observer at rest in reference frame \(\mathrm{C}\) ?