What is the ratio of potential energy of the charge systems drawn belo

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What is the ratio of potential energy of the charge systems drawn below (U2/U1)? All charges are equal in magnitude except the upper two charges on the right are halved. (1 A = 1 Angstrom = 10−10 m)

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$[3 p]$ What is the ratio of potential energy of the charge systems drawn below $(U_{2} / U_{1})$ ? All charges are equal in magnitude except the upper two charges on the right are halved. $(1 A = 1$ Angstrom $= 10^{- 10} m)$