In the circuit shown below \( \mathcal{E} = 81.0 \text{ V} \), \( R_5 = 4.00 \Omega \), \( R_3 = 2.00 \Omega \), \( R_2 = 2.20 \Omega \), \( I_5 = 8.20 \text{ A} \), \( I_4 = 5.70 \text{ A} \), and \( I_1 = 11.0 \text{ A} \). Find the current through \( R_2 \) and \( R_3 \), and the values of the resistors \( R_1 \) and \( R_4 \)
Based on the known variables, which two junctions should you consider to find the current \( I_2 \)?
Which loop will give you an equation with just \( R_1 \) as the unknown? Did you follow the sign convention for the potential difference across each element in the loop?