from a university Database schema how do i write thequery for these problems in sql

Problem 1. From the student relation of the small university database, find the id, name, department name and total credit of all the students who has completed 50 to 100 credit hours. Problem 2. From the section relation of the small university database, find the distinct course id of all the courses, the course id of which starts with the following two characters: CS Problem 3. From the takes relation of the small university database, find the id of all the students who got at least one 'A' grade or one 'A-' grade. Problem 4. From the student and takes relation of the small university database, find the name of all the students who got a ' C ' grade. Problem 5. From the course and section relation of the small university database, find the section ID, Building, room number and time slot of the course titled 'Image Processing' Submission guideline: For each of the problems submit the SQL query and the output relation. Submit your solution in blackboard as a word or pdf file. Hardcopy submission will not be accepted