In a certain desert region the number of persons who become seriously ill each year from eating a certain poisonous plant is a random variable having a Poisson distribution with λ = 5.2. Use Table II of "Statistical Tables" to find the probabilities of
(a) 3 such illnesses in a given year;
(b) at least 10 such illnesses in a given year;
(c) anywhere from 4 to 6 such illnesses in a given year.