Equivalent Resistance

1. By using only two resistors singly, in series, or in parallel you are able to obtain resistances of 18.0, 24.0, 72, and 96 . What are the two resistances? (Make sure your answer is consistent.)
   
   
   
   
2. Find the equivalent resistance of the following circuit:
   Be sure to show each step on your group's white board.
   
   
   
   
3. Find the heat energy generated by the 3 Ohm and the 12 Ohm resistors in the circuit in problem 2