3. The average grades of students of Information Technology in the second semester are as follows: Average Grade Frequency 3 4.51 - 5.00 4.01 -4.50 5 3.51-4.00 14 3.01 -3.50 22 2.51-3.00 24 2.01 -2.50 16 1.51 -2.00 8 1.00 -1.50 2 Compute the mean, median and mode. 4. The efficiency ratings of 108 faculty members of a certain university were taken and are shown below: Efficiency Ratings Frequency, f 97-99 5 94-96 11 91-93 26 88-90 29 85-87 12 82-84 10 79-81 7 76-78 6 73-75 2 Determine the value of the following: a. P16 b. D5 c. P63 d. Dg e. P91 f. Q1