3- In the circuit shown, if the reading of the ammeter is (0.5A), answer the following questions: a- Find the equivalent resistance (Req) in the circuit. b- Find the value of the electromotive force (.). C- Find the reading of the voltmeter (V). A MMM R = 12 22 MMM R=622 Eo V MMM R3= 15 22 MMM R4=792 d- On the circuit above connect a device (location), which enables you to determine the current in R, and what value will it read?