hi, would like some help in answering this question.

A When studying Cesium atoms over a period of 365 days, 1,000,000 decay into 977,287 atoms. i. Find the mean number of atoms that decay each day. (4 marks) ii. What is the probability that on a given day, 50 atoms will decay? (6 marks) B. Suppose that the number of typographical errors on a single page of a book has a Poisson distribution with parameter A = 0.5. Calculate the probability that there is at least one error on the page. . (10 marks)