Consider the circuit in the figure, with the current directions defined as shown. There are four resistors in this circuit (R₁, R₂, R₃, and R₄) and four batteries with emfs Ac„°₁ = 18.5 V, Ac„°₂ = 5 V, Ac„°₃ = 11.5 V, and Ac„°₄ = 22.8 V, each with internal resistance given by r_i as marked in the figure.

Randomized Variables

Ac„°₁ = 18.5 V
Ac„°₂ = 5 V
Ac„°₃ = 11.5 V
Ac„°₄ = 22.8 V

Part (a) Calculate the current I₂ in amps.

Part (b) Calculate the current I₃ in amps.

Part (c) Calculate the current I₁ in amps.