For a group of 70 people, assuming that each person is equally likely to have a birthday on each of 365 days in the year, compute

(a) The expected number of days of the year that are birthdays of exactly 4 people:
$E[\mbox{days with 4 birthdays}] =$

(b) The expected number of distinct birthdays:
$E[\mbox{distinct birthdays}] =$