Eq-4 what do you do when you see another vessels red and white lights

Answer;

When only white and red lights are visible, you are approaching the port side of a powerboat and thus you should give way to your starboard side.

Explanation;

-The red and green lights are called sidelights (or combination lights) because they are visible to another vessel approaching from the side or head-on. The red light indicates a vessel's port (left) side; the green indicates a vessel's starboard (right) side.

-When only a white light is visible, one may be overtaking another vessel. Give way to either side. Additionally, when only a red light is visible, you are approaching the port side of a sailboat.

a=c and then d= c because of the band so you get ac/dc and you add them together you get sound waves