4-34 Which of the following would be includable in gross income? a. Alice appeared on a TV quiz show and received a prize of $5,000. b. Bart received $500 from his employer because he developed an idea that reduced the employer's production costs. c. Churck borrowed $500 from his mother in order to finance his last year in college. Upon his graduation, Chuck's mother told him he did not have to repay the $500. She inteded the $500 to be a graduation present