1. The problem statement, all variables and given/known data Given = 5 - light bulbs Light bulbs 1 and 2 each dissipate 180 mW at 12 V Light bulbs 3, 4, and 5 each dissipate 45 mW at 9V. 1 - 12 V supply 2 - Resistors (Range 10-1000 Ω) 5- switches The design must meet the criteria: Each light bulb can be independently turned on and off Light bulbs 1 and 2 must get 12 V from the power supply when on. The other light bulbs must get 9V (+/- 5%) from the power supply when on. 2. Relevant equations V = IR P = I2R 3. The attempt at a solution Light bulbs 1 and 2 have 800 Ω each. Light bulbs 3, 4, and 5 have 1800 Ω each. I can solve the diagram easily when I have only one light bulb on each time. It is when I have multiple light bulbs on that the voltages change and no longer fit the criteria.