Approximately what percentage of volunteer coaches lack the necessary formal preparation to coach?

According to the article Zipping Up the Genes about twins reared apart,the number which best

summarizes the amount of variance in personality which is accounted for by genetic factors is (a) zero (b) .25 (c) .50 (d) .90

The story of Sybil, a woman who had 16 separate personalities, illustrates multiple personality, which is a rare form of

a. bipolar disorder. b. schizophrenia. c. dissociative disorder. d. personality disorder.