A cell of e.m.f. 1.5V and internal resistance 1.0W is connected to two resistors of 4.0W and 20.0 in series as shown in the figure: Calculate the:
(i) Current in the circuit.
(ii) Potential difference across the 4.0 ohm resistor.
(iii) Voltage drop when the current is flowing.
(iv) Potential difference across the cell.