Monica found the volume of the prism below using the expression .

What errors did Monica make? Check all that apply.
She should have counted only 2 unit cubes instead of 4.
She should have counted 8 one-third cubes instead of only 4.
She should have found the total value of the one-third cubes by multiplying by instead of by .
Each fractional cube is worth instead of the that she used.
She cannot stack more than one layer of fractional cubes in a prism.