Respuesta :

put the numbers in order...
78.4 , 87, 89, 95, 96, 99

Q1 (lower quartile) = 87
Q2 (median) = (89 + 95) / 2 = 184/2 = 92
Q3 (upper quartile) = 96
The lower quartile is 87.

Hope This Helps You!
Good Luck Studying :)