The weights of the students in a class are the following: \( 69,70,75,66,83,88,66,63,61 \), \( 68,73,57,52,58 \), and 57 .
8. Find the value of \( D_{8} \) of the students' weights.
M. 57
A. 66
T. 75
H. 83
9. Calculate the value of \( D_{4} \) of the students' weights.
M. 88
A. 75
T. 63
H. 52
10. What is the \( Q_{2} \) of the students ' weights?
M. 63
A. 66
T. 70
H. 88