A major hurricane is a hurricane with wind speeds of 111 miles per hour or greater. During the 20th century, the mean number of major hurricanes to strike the U. S. mainland per year was about 0.7. Find lambda (λ) for a three-year period. Find the probability that in a three-year period (a) exactly 2 major hurricanes will strike the U. S. mainland, (b) five hurricanes will strike the mainland, and (c) at least 3 hurricanes will strike the U. S. mainland.