If 65 percent of the population of a large community is in favor of a proposed rise

Question:

If 65 percent of the population of a large community is in favor of a proposed rise in school taxes, approximate the probability that a random sample of 100 people will contain
(a) At least 50 who are in favor of the proposition;
(b) Between 60 and 70 inclusive who are in favor;
(c) Fewer than 75 in favor.