This is a test of commonsense. Complete the next sentence:

How to invest in 401 k
Know your limits.
The internal revenue service (irs) establishes the maximum individuals can contribute to their 401 k every year. Your employer might also impose limits on you.
Check the irs website for limits, which can change from one tax year to the next. For example, in 2013 investors under 50 were able to save up to $17 , 500 in pretax dollars through a 401k.