can you pls explain how to solve this? thank you

For simplicity, suppose there are five students in a class. Suppose the scores of these students on three tests are as follows. Student Test 1 Test 2 Test 3 A 80 82 92 B 82 84 86 C 76 74 82 D 82 78 F 94 96 86 (a) Write a 5 x 3 matrix A to represent the information. A = (b) What are a 11, a12, and a 13? 211 212 213 What is - (a11 + 212 + a13)? (Round your answer to one decimal place.)What does this quantity represent? O average test scores for the second test O average test scores for the first, second, and third tests O student A's average test score O student E's average test score O the class's average test score for all tests (c) What are a 12, a22, a32, a42, and 252? 212 232 242 252 What is 1 5 -(212 + azz + 232 + 242 + 252)? What does this quantity represent? O average test scores for the second test O) average test scores for the first, second, and third tests O student A's average test score O student E's average test score O the class's average test score for all tests(d) What is the average score of student & based on the three tests? (Round your answer to one decimal place.) (e) What is the average score of the five students for the third test