Can someone help me with this problem.

Asurvey of 45 teens found that they spent an average of 25.6 hours per week in front of a screen (television, computer, tablet, phone, based on the survey’s sample mean, which value could be the population mean? 2.3 hours 27.4 hours 75.3 hours 41.5 hours

Which of the following shows the length of the third side, in inches, of the triangle below

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?