Graph B is a reflection at y = 4, which means "flip" graph A so it is upside down.
At 0 seconds:
Graph A is 8 ft from the bottom so Graph B is 0 ft from the surface.
At 2 seconds:
Graph A is 0 ft from the bottom so graph B is 8 ft from the surface.
Graph B is increasing from 0 to 8.
Answers: 0, increasing, 8
Hope this helps!