Recall that the passive sign convention says the power is determined from the current flowing into the positive voltage terminal. Using the passive sign convention, determine the power supplied to the elements in the following circuits.

$a.$

If $I = 2 A, V_1 = 6 V$ and $V_2 = 12 V$, then $P_1 = -12$ W and $P_2 = 24$ W.

If $I = 1.8 A, V_1 = 7 V$ and $V_2 = 18 V$

$P_1 =$ $W$

$P_2 =$ $W$

$b.$ $I = 5 A, V_1 = 15 V$ and $V_2 = 27 V$

$P_1 =$ $W$

$P_2 =$ $W$

$c.$ $I = 5 A, V_1 = 15 V$ and $V_2 = -27 V$

$P_1 =$ $W$

$P_2 =$ $W$