Finding recoil speed?

A radioactive nucleus is at rest when it spontaneously decays by emitting an electron and neutrino. The momentum of the electron is 8.20 x 10-19 kg�m/s and it is directed at right angles to that of the neutrino. The neutrino's momentum has magnitude 4.91 x 10-19 kg�m/s. In what direction does the newly formed (daughter) nucleus recoil? Let the electron direction be along the positive x-axis and find the direction of nucleus recoil with respect to the electron's direction.