Problem $5(25$ points$)$ In a particular neutron$-$induced fission of U$235,4$ prompt neutrons are produced and two fission fragments. It is known that one of the fission fragment $(1)$ is Ag$121.5$A $(5$ Points$)$: What is the other fission fragment $(2)?5$B $(5$ Points$)$: How much energy is liberated promptly $($i$.$e$.,$ before the fission fragments begin to decay$)?5$C $(10$ Points$)$: If the initial kinetic energy of the fission fragment Ag$121(1)$ is $71\mathrm{.}8$ MeV, what is the initial kinetic energy of the other fission fragment $(2)?$ Assume that the momentum carried by the prompt neutrons is negligible. Hint: Conservation of momentum indicates that the momentum of fission fragment $1$ is equal $($and opposite$)$ to the momentum of fission fragment $2.$ Thus m$1$v$1=$ m$2$v$2,$ where v is the fission fragment velocity $($magnitude$).$ In collision problems such as this, both energy and momentum have to conserved independently $($non$-$relativistic$).5$D $(5$ Points$)$: What is the total kinetic energy shared by the four prompt neutrons.