For each problem, display the equation used to form the answer. Leave combinations, permutations,

factorials, and exponents intact.

7. (2 points) How many bit strings contain exactly five Os and 14 Is if every 0 must be immediately followed by at least two 1s? 8.(1 point) In how many ways can a photographer at a wedding arrange 6 people in a row from a group of 10 people, where the bride and the groom are among these 10 people, if exactly one of the bride and the groom is in the picture? 9.(I point) How many bit strings of length seven either begin with two Os or end with three 1s