3-Retirement Plans. (Obj. 1) Diana has a consulting practice. She has no employees. For the 2022 tax year, Diana's gross consulting revenue was $155,000, and her operating expenses, not including retirement plan contributions, were $10,000. In addition to her consulting income, Diana also received $5,000 in 2022 for writing a chapter in a book about management consulting. In 2022, Diana established a defined contribution (Keogh) plan. The plan stipulates a fixed percentage of 10% of compensation as the amount of the required annual contribution. a. What is the amount of self-employment tax that Diana must pay for 2022? b. What is the required dollar contribution that Diana must make to her Keogh for 2022 ? c. By what date must the Keogh be established in order for Diana to take a deduction for the contributions on her 2022 tax return? d. By what date must the contributions be paid into the Keogh plan in order for Diana to take a deduction on her 2022 tax return