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)

** 1. ** Find the moment M_y of the system about the y -axis.

Answer:M_y =

Answer:

** 2. ** Find the moment

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** 3. ** Find the center of mass

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