French what?

An Australian Mathematician, a British Physicist, a Canadian Chemist, an Italian Statistician, and a French Biologist are at a conference. They are to talk about their recent research project. However, before they begin, they tell the audience that they must find out who is who. They will allow a total of four questions, and they say that the Australian Mathematician will answer 100% of the questions with the truth, the British Physicist will answer 75% of the questions with the truth, the Canadian Chemist will answer 50% of the questions with the truth, the Italian Statistician will answer 25% of the questions with the truth, and the French Biologist will answer as he pleases. To avoid getting discovered because of their accents, they will only answer through writing. They are all wearing different color of clothes, as in the picture:

The audience asks the questions, which everyone will answer.

1. Are you the Canadian Chemist?
   Pink: No
   Blue: Yes
   Brown: No
   Red: No
   Black: No

2. Are you the Australian Mathematician?
   Pink: Yes
   Blue: No
   Brown: Yes
   Red: Yes
   Black: No

3. Are you the British Physicist?
   Pink: No
   Blue: Yes
   Brown: Yes
   Red: No
   Black: No

4. Are you the Italian Statistician?
   Pink: No
   Blue: No
   Brown: Yes
   Red: No
   Black: Yes

When the audience is done, they know exactly who is who.

Do you know who is who? If you do, then what color of clothes is the French Biologist wearing?