A student designs a circuit containing two ideal DC voltage sources, \(\varepsilon_1\) and \(\varepsilon_2\), and three resistors, \(R_1\), \(R_2\), and \(R_3\), arranged in a two-loop network with a shared central branch containing \(R_2\). The student must simultaneously measure the electric current flowing through \(R_2\) and the terminal potential difference across the right branch containing \(\varepsilon_2\) and \(R_3\), without altering the normal operating currents or potentials in any branch. Which of the following circuit schematics shows the correct placement of an ideal ammeter \(\text{A}\) and an ideal voltmeter \(\text{V}\) to perform these measurements?