I am stuck on this question Problem 5. 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 statements below is (i)...

I am stuck on this question

Problem 5. 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 statements below is (i) true, (ii) false, or (iii) can’t be decided from the information given.
a) The overall proportion of right-handers in the population is exactly 90%.
b) The overall proportion of right-handers is between .88 and .92.
c) If the sex ratio in the population is 1 to 1, then the proportion of right-handers is 90%
d) If the proportion of right-handers is 90%, then the sex ratio must be 1 to 1.
e) If there are at least three times as many women as men in the population, then the overall population of right handers is at least 91%.