Suppose you have the following circuit diagram.
Here R1=22kΩ, R2=33kΩ, R3=1.1kΩ, R4=3.3kΩ, R5=33kΩ, R6=11kΩ, R7=33kΩ, R8=1.1kΩ, R9=
3.3kΩ are the resistances on the circuit where kΩ stands for kilo ohm. The electromotive forces
of the batteries are E1=3volts and E2=6volts.

Figure 1

a) Calculate Rbk, the resistance equivalent to R5, R6, R7, R8, and R9 between the
terminals b and k.
b) Calculate the current through R1.

c) Calculate the current through Rbk and call it Ibk.
d) Calculate the power dissipated by the R2 resistor.
e) Calculate the potential difference across the oc terminal.