Ten people are going to a private screening of a movie in a small theater. There are

Question:

Ten people are going to a private screening of a movie in a small theater. There are two rows in the theater. The first row has I seats, and the second row has 6 seats.
a. How many ways can you arrange the seating of the 10 people altogether?
b. How many seating arrangements are possible if 3 of the 10 people are in a family, and that family wants to sit together?