The currents I₁, I2, and 13, measured in Amperes, in the three branches of a parallel circuit are determined by the following system of linear equations. 31₁ 5 13-16 911-712-13 = -48 -6 1₁ + 9 I2 = 42 (a) Write the system in matrix form Ax = b; (b) Solve the system of linear equations using Cramer's Rule. Check your answer by substituting into the system of linear equations.

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