Practice Problem on Adding Resistors
                R1=2 Ohm
          +------/\/\/\------+            R4=4 Ohm
          |                  |      +------/\/\/\------+
          |     R2=9 Ohm     |      |                  |
    ------+------/\/\/\------+------+                  +------
          |                  |      |     R5=7 Ohm     |
          |     R3=6 Ohm     |      +------/\/\/\------+
          +------/\/\/\------+      
If the voltage across R2 is 3 V, what is the current through R1? Give your answer to two decimal places.

ANSWER = 1.50 A