Crop damage by wild boars. Refer to the Current Zoology

(Apr. 2014) study of crop damage incurred by wild boars in southern Italy, Exercise 3.18

(p. 158). If crop damage by wild boars occurs, the probability that the type of crop damaged is cereals is .45, legumes .20, and orchards .05. In a random sample of 100 crop damage incidents caused by wild boars, what is the probability that at least 50 incidents involve

a. cereal crops?

b. legumes?

c. orchards?