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Using split(); cut through the following array and output the student's name and their average

var scores = new Array(5)
scores[0] = "Jane Doe,22,80,90";
scores[1] = "John Doe,21,70,65";
scores[2] = "Jack Smith,30,80,80";
scores[3] = "Jen Smith,30,90,70";
scores[4] = "Steven Taylor,12,90,90";