Which two teams began play as expansion franchises in 1998?

Which team was known as the Colt .45s before becoming the Astros in 1965? Which team played in Boston and Milwaukee before moving to Atlanta in 1966? Starting with which season did Cleveland's MLB team play as the Guardians? In what year did the Tampa Bay Devil Rays shorten their name to the Rays? Which two teams began play as expansion franchises in 1993? Which two teams began play as expansion franchises in 1977? Which two National League expansion teams began play in 1962? Which team switched from the American League to the National League in 1998?