music: My love, there's only you in my life?

Questions

who began his career with 'the yardbirds' and is established as one of the best rock guitarists of his generation?

who began his professional career with black sabbath?

who sang for 'bad company' and 'the firm', then went out on his own?

who discovered the grand canyon?

in 1981, who won song of the year with 'sailing'?