(6) Determine the total resistance, total current, voltage V_R1, current I_R1, current I_R2, voltage V_R2, current V_R3, and voltage V_R3 in the following circuit. What happens (increases or decreases) to the total resistance and total current if another resistor is added in that circuit? What happens (increases or decreases) to the total resistance and total current if a resistor is removed in that circuit?

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