The Stem-And-Leaf Display Given Here Shows the Final Examination Scores $\textbf{ Stem-and-Leaf }$

Short Answer

The stem-and-leaf display given here shows the final examination scores of students in a statistics course. (Leaf unit = 1.0)
$\textbf{ Stem-and-Leaf }$
$\textbf{ Display of Scores }$
a) Find the median score.
b) Find the quartiles Q1 and Q3.
c) What proportion of the students scored below 70? Round your answer to three decimal places.