Problem 1B A class has two secitons. Students in Section 1 have an average score of 75 with an SD of 10. Students in section 2 have an average score of 60 with an SD of 10. a) If possible, say whether the SD of the scores of all the students in the class is (i) less than 10 (ii) equal to 10 (iii) greater than 10 Explain your choice. If it is not possible to make the choice with the information given, explain why not. b) Suppose section 1 has 30 students and section 2 has 20. Find the SD of the scores of all the students in the class