Karen, 28 years old and a single taxpayer, has a salary of $30,000 and rental income of $33,000 for the 2015 calendar tax year. Karen is covered by a pension through her employer.

a. What is the maximum amount that Karen may deduct for contributions to her IRA for 2015?

b. If Karen is a calendar year taxpayer and files her tax return on August 15, what is the last date on which she can make her contribution to the IRA and deduct it for 2015?