Table:
text: List of U.S. Highways in Michigan
Former mainline highways
Former mainline highways
South_or_west_terminus North_or_east_terminus First_year Final_year Notes
Muskegon Detroit 1926 1962 Replaced by I-96
Erie Port Austin 1926 1973 Replaced by I-75 and M-25
Coldwater Mackinaw City 1926 2002 Replaced by I-69 and US127
Niles Hagar Shores 1937 1998 Replaced by US31 and M-63
Crystal Falls Covington 1926 1928 Replaced by US 141
New Buffalo Detroit 1926 1961 Replaced by US 12 when I-94 replaced US 12
Indiana state line Union 1926 1935 Replaced by M-205 , now a county road

Question: What is the smallest last year that has a north or east terminus from Covington for US Highways in Michigan?

Question: What is the total number of recent years that an I-96 notice has been replaced under US Highways in Michigan?

Question: In the list of US highways in Michigan, what is the smallest most recent year that a notice was replaced by i-75 and m-25 and a first year greater than 1926?

Question: What is an average first year that a reference was replaced by us 12 when i-94 replaced us 12 and a final year greater than 1961 in the US Highways listing in Michigan?