Could someone please help me with these physics questions? A quick explanation is only needed with the answer as I do not want you to spend to much time

(d) What happens if bulb A is unscrewed (clearly bulb A goes out, but what happens to the brightness of bulbs B and C)? (e) What happens if bulb C is unscrewed (clearly bulb C goes out, but what happens to the brightness of bulbs A and B)? m + A B C(50 pts.) In the circuit shown in the figure, three identical light bulbs are connected to a flashlight battery