In the circuit in figure, V1 =10V, V2 = 20V, V3 = 30V; R1 =100 0; R2 = 20002 ; R3 =30092. Using Kirchhoff's rules, what is the current in R1? 3 Vz R W RSuppose a conducting sphere of radius R1 and charge q1 is inserted in a hollow conducting sphere of inner radius R2 and outer radius R3 and charge q2. What is the potential of the sphere (not the hollow one) assuming equal to zero the potential at infinity? Assume R1 = 10cm, R2= 12 cm, R3 = 20cm, q1 = 2*10"9 C and q2 = 4* 10-9C