Colonel Pickering, Freddy Eynsford-Hill and Eliza Doolittle are characters in which musical?

Co-Jack cheese is a blend of Monterey Jack and which other cheese? Coca-Cola cans in the U.S. are made mainly of which lightweight, recyclable metal? Colonel Kurtz, a character inspired by Joseph Conrad's "Heart of Darkness", appears in which 1979 film? Col. Paul Tibbets piloted which B-29 bomber over Hiroshima on August 6, 1945? Col. William Prescott was one of the American leaders at which battle on June 17, 1775? Colby cheese, similar to cheddar but milder and moister, was first made in 1885 in which U.S. state? Which cold, volcanic island nation lies in the North Atlantic? In 1865, which hatmaker created the "Boss of the Plains", the hat that came to define the American cowboy?