Practice Problem on Adding Resistors
                    R1=9 Ohm       R2=5 Ohm
    ------+----------/\/\/\---------/\/\/\-----------+------
          |                                          |
          |     R3=3 Ohm    R4=8 Ohm    R5=4 Ohm     |
          +------/\/\/\------/\/\/\------/\/\/\------+
If the current through R2 is 9 A, what is the current through R4? Give your answer to two decimal places.

ANSWER = 8.40 A