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A fisherman and his young niece are in a boat on a small pond. Both are wearing life jackets. The niece is holding a large helium filled balloon by a string. Consider each action below independently and indicate whether the level of the water in the pond, Rises, Falls, is Unchanged or Cannot tell.

$$ The fisherman lowers himself in the water and floats on his back.

The fisherman knocks the tackle box overboard and it sinks to the bottom.

The niece gets in the water, looses her grip on the string, letting the balloon escape upwards.

The fisherman lowers the anchor and it hangs one foot above the bottom of the pond.

The niece pops the helium balloon.

The niece finds a cup and bails some water out of the bottom of the boat

Tries $0/12$