Decide how the sketches below would be listed, if they were listed in order of decreasing potential energy. That is, select "1" beside the sketch that shows the system with the highest potential energy, select "2" beside the sketch that shows the system with the next highest potential energy, and so on. Note for advanced students: since the units of each charge are not written, you may assume any convenient and reasonable unit, for example coulombs or multiples of e. +1 G +3 +2 O 1 (highest) 2 3 O 4 (lowest) O 1 (highest) 2 3 4 (lowest) +2 +1 +3 O 1 (highest) O 2 3 O4 (lowest) O 1 (highest) 2 O 3 O 4 (lowest)