Which statements about this prism partially packed with unit cubes are true? Check all that apply.

The middle layer of cubes is missing 7 unit cubes.

There are 9 unit cubes stacked in the prism

There are 7 unit cubes that are hidden from view inside the prism.

The volume of the prism can be found by 12x3 because there are 12 cubes in each layer and there are 3 layers of cubes

The volume of the prism can be found by doubling the number of cubes in the prism because it is half full

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