Refer to the circuit shown in Figure 8–2. Redraw the circuit and use the following value...

Refer to the circuit shown in Figure 8–2. Redraw the circuit and use the following values:

E_T = 12 V

R₁ = 270 Ω

R₂ = 510 Ω

R₃ = 470 Ω

R₄ = 330 Ω

Assume that an ammeter indicates a total circuit current of 15 mA. A voltmeter indicates the following voltage drops across each resistor:

E₁ = 12 V

E₂ = 0 V

E₃ = 7 V

E₄ = 5 V

What is the most likely problem with this circuit?