Question 11 The query that displays number of courses for each level except level 1: Not yet answered Marked out of 1.00 a. select course_level, count(course_id) from courses having course_level 1 group by course_level; O b. select course_level, count(*) from courses group by course_level having course_level 1; O d. None of the above. P Flag question Question 12 Display the number of different exams in the exam_results table. Not yet answered Marked out of 1.00 O a. SELECT DISTINCT exam_name FROM exam_results: O b. SELECT DISTINCT (COUNT(exam_name)) FROM exam_results: O c. SELECT COUNT (exam_name) FROM exam_results: O d. SELECT COUNT (DISTINCT exam_name) FROM exam_results: P Flag