Question: How could one compose a function named get_term_gpa that will return the term GPA for a student given the student's pid and yrtrm as parameters

How could one compose a function named "get_term_gpa" that will return the term GPA for a student given the student's pid and yrtrm as parameters using a GROUP BY function? Then, how would one divide the SUM() by the count(*) for classes taken during that semester to derive that GPA?

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