Two-table query average grouping in sql server

How to ask 35 36

--35: Query the average grade of each course, and ask to list the course name and average grade.
select Course.Cname,AVG(SC.Grade) from Course,SC where SC.Cno=Course.Cno group by Course.Cname,SC.Grade

--36: Query the total score of each student, and ask to list the student's name and total score.
select Student.Sname,sum(SC.Grade) from Student,SC where SC.Sno=Student.Sno group by SC.Grade,Student.Sname