Qbank id 1745 mistake? following, question, solution, believe, mistake

lunarfollies

Hello Guys
I believe there is a mistake in question id 1745.
Problem: What are the median and the third quintile of the following data points?
9.2% 10.1% 11.5% 11.9% 12.2% 12.8% 13.1% 13.6% 13.9% 14.2% 14.8% 14.9% 15.4%
Qbank solution is 13.1% median and third quintile is 13.7%
Qbank interpolation is: 0.136 + (o.4)(0.1390.136)= o.1372 =>13.7%
My solution is: 0.136 + (0.6 due to third quintile)(0.1390.136) = 0.1378 =13.8%, but not given as one of the solution options.
third quintile is 0.6.

Feedback welcomed