A radioactive nucleus at rest decays into a second nucleus, an electron, and a neutrino. The electron and neutrino are emitted at right angles and have momenta of $9\mathrm{.}651023$ kg$$m$/$skg$$m$/$s and $,6\mathrm{.}301023$ kg$$m$/$skg$$m$/$s respectively. Determine the direction of the momentum of the second $($recoiling$)$ nucleus. Assume that the neutrino and the electron move along $$x$$x and $$y$$y axes respectively.