A certain radioactive (parent) nucleus transforms to a different (daughter) nucleus by emitting an electron and a

Question:

A certain radioactive (parent) nucleus transforms to a different (daughter) nucleus by emitting an electron and a neutrino. The parent nucleus was at rest at the origin of an xy coordinate system. The electron moves away from the origin with linear momentum (–1.2 x 10–22 kg ∙ m/s) i; the neutrino moves away from the origin with linear momentum (–6.4 x 10–23 kg ∙ m/s) j. What are the

(a) Magnitude and

(b) Direction of the linear momentum of the daughter nucleus?