finance please help

A stock had returns of 14 percent, 13 percent, 10 percent, and 7 percent for the past four years. What is the 95 percent probability range of returns for this stock? 16.2 percent to 28.2 percent -5.1 percent to 17.1 percent 27.3 percent to 39.3 percent 16.2 percent to 17.1 percent