Use Chebyshevs theorem and Theorem 5.3 to verify that the probability is at least 35 36 that

Question:

Use Chebyshev’s theorem and Theorem 5.3 to verify that the probability is at least 35 36 that
(a) In 900 flips of a balanced coin the proportion of heads will be between 0.40 and 0.60;
(b) In 10,000 flips of a balanced coin the proportion of heads will be between 0.47 and 0.53;
(c) In 1,000,000 flips of a balanced coin the proportion of heads will be between 0.497 and 0.503.