Bryce, a mouse lover, keeps his four pet mice in a roomy cage, where they spend much of their spare time, when they're not sleeping or eating, joyfully scampering about on the cage's floor. Bryce tracks his mice's health diligently and just now recorded their masses as 0.0157 kg, 0.0151 kg, 0.0233 kg, and 0.0207 kg. At this very instant, the x‑ and y‑ components of the mice's velocities are, respectively, (0.787 m/s,−0.617 m/s) , (−0.571 m/s,−0.137 m/s) , (0.577 m/s,0.205 m/s) , and (−0.839 m/s,0.561 m/s) . Calculate the x‑ and y‑ components of Bryce's mice's total momentum, px and py .