Answer should be typed format only without insert table or image.copied content strictly prohibited remember

3.65 The following table gives the frequency distribution of the number of hours spent last week on cell phones (making phone calls and texting) by all 100 students of the tenth grade at a school. Hours per Week Number of Students 0 to less than 4 14 4 to less than 8 18 8 to less than 12 25 12 to less than 16 18 16 to less than 20 20 to less than 24 Find the mean, variance, and standard deviation