On average, a textbook author makes 2 word-processing errors per page on the first draft of her textbook (a) What is the probability that on the next page she will make 3 or more errors? (b) What is the probability that a randomly selected page is error free? Click here to view the table of Poisson probability sums. (a) The probability that a page has at least 3 errors is (Round to four decimal places as needed.)