Solving a problem in physics section 1 point 30 electro

30. Three galvanic element with electromotive forces in ε1 = 2,5, ε2 = 2,2 In, ε3 = 3,0 V and the internal resistance of 0.2 ohm each include, as shown in the diagram (Fig.). The external resistance R = 4,7 Ohm. Find forces currents in all parts of the circuit, the potential difference between the nodes, the amount of Joule heat generated in the whole circuit, and the operation of each element in time t = 1 s.