More circuit problems

1.  Consider two resistors, both 10 ohms, connected to a 20-V battery.  Find the current through each if they are connected:

A.  In series

B.  in parallel

2.  Now consider the problem again:  4 and 2 ohm resistors, connected to a 24-V battery.  Find the currents, when connected:

A.  In series

B.  in parallel 

3.  Two identical light bulbs are connected in series. The same bulbs are connected in parallel.  Which are brighter?

4.  Consider 1 bulb connected to a battery vs. 3 identical bulbs in parallel to the same battery.  Which bulb(s) are brighter?