Please provide what is being ask in the picture below.

Consider the examination results of 60 students in a Spanish class. Classes Frequency (f) 10-19 2 20-29 30-39 23 40-49 11 50-59 8 60-69 6 70-79 2 80-89 N = 60 Compute the value of the following: 1. Mean 2. Value of the Semi-inter quartile range 3. Value of the Average deviation 4. Value of the variance