Need help with this Qs. Thank you.

In studies for a medication, 7 percent of patients gained weight as a side effect. Suppose 459 patients are randomly selected. Use the normal approximation to the binomial to approximate the probability that (a) exactly 33 patients will gain weight as a side effect. (b) no more than 33 patients will gain weight as a side effect. (c) at least 42 patients will gain weight as a side effect. What does this result suggest? Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2)