Determine the Quartile or Interquartile Range as Specified $\begin{array} { l l l l l } 91 & 47 & 86 & 69 & 61 \end{array}$

Determine the quartile or interquartile range as specified.
-The test scores of 19 students are listed below. Find the interquartile range. $\begin{array} { l l l l l } 91 & 47 & 86 & 69 & 61 \end{array}$
$\begin{array} { l l l l l } 63 & 97 & 57 & 90 & 76 \end{array}$
$\begin{array} { l l l l l } 82 & 83 & 53 & 88 & 75 \end{array}$
$\begin{array} { l l l l } 42 & 92 & 94 & 65 \end{array}$

A) 29
B) 29.5
C) 27
D) 28.5