$[-/1\mathrm{.}04$ Points$]$

The masses $m_l$ are located at the points $P_r$ Find the moments $M_x$ and $M_y$ and the center of mass of the system.

$,m_1=4,m_2=3,m_3=2,m_4=5$;

$P_1(6,3),P_2(3,-1),P_3(-2,1),P_4(-2,-5)$

$M_x=$

$M_y=$

$(\stackrel{}{x}\frac{,}{b}ar(y))=()$