Table: us_highways_michigan
Columns: south_or_west_terminus
north_or_east_terminus
first_year
final_year
notes

Question: What is the most minimal Final year that has a North or east end of covington?
SQL: SELECT MIN("final_year") FROM us_highways_michigan WHERE "north_or_east_terminus" = 'covington'

Question: What is the total of Final year that has a Notes of replaced by i-96?
SQL: SELECT SUM("final_year") FROM us_highways_michigan WHERE "notes" = 'replaced by i-96'

Question: What is the most minimal Final year that has a Notes of replaced by i-75 and m-25, and a First year larger than 1926?
SQL: SELECT MIN("final_year") FROM us_highways_michigan WHERE "notes" = 'replaced by i-75 and m-25' AND "first_year" > 1926

Question: What is the average First year that has a Notes of replaced by us 12 when i-94 replaced us 12, and a Final year larger than 1961?
SQL: SELECT AVG("first_year") FROM us_highways_michigan WHERE "notes" = 'replaced by us 12 when i-94 replaced us 12' AND "final_year" > 1961