simple matlab command

Four weekend Programming classes consist of students with the following numbers: Class 1=32 students, Calss 11=40 students, Class III=34 students and Class IV=28 students. The distribution of students' average marks for each class for four (4) tests is given as the followings: Test1 = [76 78 68 82] Test2 = (58 65 70 66] Test3 = [82 84 75 90] Test4 = [77 68 69 75] For the above distribution, write a single SciLab Matlab command to determine: 1. Number of students attended the Programming class 2. Total student marks for Test 1 3. Total Test2 mark for Class III 4. Total student Test3 mark for each class 5. Which class has an average mark of Test4 above 70 6. Minimum average mark of Test4