Misc: In "Pilgrims Progress", who imprisoned Christian and Hopeful in Doubting Castle?

Questions

"Mary, Mary, ----- --------, --- ---- ---- ------ ----?" (omit comma)?

Famous surrogate mother who refused to give up the baby??

Miniskirt innovator opened her first shop on Kings Rd in Chelsea, in 1955?

Won 1977 French Open mixed doubles with John McEnroe, now works for CBS & ESPN?

How many colours are there in the rainbow-coloured, "Freedom Flag"??