Consider the circuit shown with four identical bulbs and a battery. a. Rank the brightnesses of bulbs 1, 2, and 3 when the switch is open. Explain your ranking. b. Rank the brightnesses of all four bulbs when the switch is closed. Explain your ranking. c. What happens to the brightnesses of bulbs 1, 2, and 3 when the switch is closed? Do they get brighter, dimmer, or remain at the same brightness?

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