Find all currents and voltages in the circuit. Hint - find the total resistance first. Recall that resistors in series add to get a total resistance. In parallel, you need to add the inverse of the resistors, and take the inverse of that quantity.
2. Knowing that power (P) is work over time (W/t), derive a simple expression for electrical power (which will have measurable quantities such as V, I and/or R in it).
