$8.$Because expenses incurred both in a business and for the production of investment income are deductible, why is it important to determine in

which category a particular activity falls?

$20.$ Why did Congress enact the wash sale provisions?

$25.$ Assume that Jill is engaged in painting as a hobby. During the current year, she earns $$1,000$ from sales of her paintings and incurs $$1,300$ ex$-$penses for supplies and lessons. Jill $$s salary from her job is $$70,000.$ What is the tax treatment of the hobby income and expenses?