Given the figure below and if the mass of the beam is 170 g and L1 = 300 mm, determine: (a) M2 if M1 = 990 g, M3 = 170 g, L2 = 400 mm and L3 = 220 mm, and (b) L3 if M1 = 890 g, M2 = 420 g, M3 = 220 g and L2 = 200 mm M₁ L₁ L2 1000mm M₂ M₂
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