11-54 (LO 11-2) Determine the maximum contribution that can be made to a Keogh plan in each of the following cases. In all instances, the individual is self-employed, and the self-employment tax reduction has already been taken. Required: a. Self-employment income of $61,000. b. Self-employment income of $61,000 and wage income of $33,500. c. Self-employment income of $140,000. d. Self-employment income of $297,000. a. Maximum Keogh plan contribution b. Maximum Keogh plan contribution c. Maximum Keogh plan contribution d. Maximum Keogh plan contribution Amount