I don’t know what is your problem is
The second quartile Q₂ is nothing but the Median.
This means that it median = 4.2
Use the formula (
)^2
in order to create a new term to complete the square.
(x−5)2−25
Due to the distance formula the answer should be root 113 or 10.63
1 3/6 + 4/6 = 1 7/6 = 2 1/6