Please explain how i can compute these questions.

1. Given the following frequency distribution, compute for the following. Class Intervals+ frequency (f)+ 30 -34+ 35-39+ 14+ 40 - 44+ 26+ 45 -49+ 35+ 50-54+ 23+ t 55-59+ 19+ 60-64+ 15+ 65 - 69 6+ 70 - 74+ 4+ a. Range b. Quartile deviation C. Average deviation- d. Standard deviation 2. The following data show the respective ages, in years, of 10 male employees at a fast- food center. They are 21, 38, 29, 45, 59, 35, 49, 55, 51 and 58. Determine the following. a. Range b. Quartile deviation C. Average deviation d. Standard deviation 3. Compute for the following, given these data:" 132, 144, 127, 152, 101, and 165.~ a. Coefficient of skewness b. Meant C. Median+ d. Standard deviation