BEGIN{ print "Name   Test1   Test2   Test3   Average   Grade"}
{avg=($2+$3+$4)/3;
                if (avg >= 90 && avg < 100) grade="A"
                else if (avg >= 80 && avg < 89) grade="B"
                else if (avg >= 70 && avg < 79) grade="C"
                else if (avg >= 60 && avg <69) grade="D"
                else grade="F"
printf("%-8s%-8d%-8d%-8d%-8d%-8s\n",$1,$2,$3,$4,avg,grade)}
END{
print "Average"}