Explain why the loss resulting from the sale of a computer in the following three situations is treated differently for income tax purposes:

a. Monica sells her personal computer at a loss of $1,300. None of the loss is deductible.

b. Omar sells a computer used in his carpeting business at a loss of $4,300. The loss is fully deductible.

c. Jerry sells his computer at a loss of $3,800. Jerry used the computer to keep track of his investment portfolio. Only $3,000 of the loss is deductible.