In a particular population of men and women, 92% of women are right handed, and 88% of men are right handed. Indicate whether each of the following statements is (i) true,  (ii) false,  or (iii) can't be decided on the basis of the information given

a) The overall proportion of right handers in the population is exactly 90%.

b) The overall proportion of right handers in the population is between 88 % and 92%.

c) If the sex ratio in the population is 1 -to-I then a) is true.

d) If a) is true then the sex ratio in the population is 1 - to -1.

e) Jif there are at least three times as many women as men in the population, then the overall population of right handers is as least 91%.