DEFG Corp. had the return of 12% in 2016, 15% in 2017, -3% in 2018, and 14% in 2017. What is the geometric average return of DEFG Corp.s return during these years?

9.34%

Same facts as above. What is the 99 percentage range of DEFG Corp.s returns (or, in other words, what would be the range in which the 99% of DEFGs return will fit in according to the data we have)?

A [-4.32%, 23.32%]

B [-7.02%, 26.02%]

C [-12.24%, 31.24%]

D [1.07%. 17.93%]

just need the second question :) I will thumbs up if you answer!