Explain whether each of the following are considered taxable income.
a. $10,000 payment for illegal services
b. $500 Chicago Blackhawks tickets received in exchange for maintenance performed on your friendʼs car
c. $3,500 loan forgiven by a friend
d. $1,000 cash found in old purse purchased at a flea market
e. $100 found on the sidewalk
f. $200 received for dog sitting
g. $1,250 increase in the fair market value of stock owned at end of taxable year