Elvira is a self-employed taxpayer who turns 42 years old at the end of the year (2016). In 2016, her net Schedule C income was $120,000.This was her only source of income. This year, Elvira is considering setting up a retirement plan. What is the maximum amount Elvira may contribute to the self-employed plan in each of the following situations?

a. She sets up a SEP IRA.

b. She sets up an individual 401(k).