Question: What is the sum of Week when there were 67,968 people in attendance?
SQL: SELECT SUM("Week") FROM "2-15331575-1" WHERE "Attendance" = '67,968';

Question: What is the Week number with a result of l 31–28?
SQL: SELECT COUNT("Week") FROM "2-15331575-1" WHERE "Result" = 'l 31–28';