UnScramble this Word: n m w o a?

Questions

Bernard Clemmens of London managed to sustain a ---------- for an officially recorded time of 2 mins 42 seconds.?

---------- Clemmens of London managed to sustain a fart for an officially recorded time of 2 mins 42 seconds.?

Bernard ---------- of London managed to sustain a fart for an officially recorded time of 2 mins 42 seconds.?

Between 25% to 33% of the population ---------- when they are exposed to light.?

---------- is such a good stain that Native Americans used it for a paint.?