Table: broncos_1978_season
Columns: week
date
opponent
result
game_site
record
attendance

Question: Which week has a record of 5–2?
SQL: SELECT "week" FROM broncos_1978_season WHERE "record" = '5–2'

Question: On what date was the result w 28–7?
SQL: SELECT "date" FROM broncos_1978_season WHERE "result" = 'w 28–7'