The masses $m_i$ are located at the points $P_i.$ Answer the following questions. $$m_1 = 4, \; m_2 = 8, \; m_3 = 2, \text{ and } m_4 = 10$$ $$P_1(2,-1), P_2(6,1), P_3(3,-1), P_4(-4,2)$$

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1. Find the moment $M_y$ of the system about the $y$-axis.
Answer: $M_y =$

2. Find the moment $M_x$ of the system about the $x$-axis.
Answer: $M_x =$

3. Find the center of mass $(\overline{x},\overline{y})$ of the system.
Answer: $\overline{x} =$ and $\overline{y} =$

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