There are 10 players on the local basketball team. The coach decides to randomly pick 5 players

Question:

There are 10 players on the local basketball team. The coach decides to randomly pick 5 players for the game.
a. In how many different ways can the coach select 5 players to start the game if order does not matter?
b. In how many different ways can the coach select 5 players to start the game if order (the type of position, i.e., point guard, center, etc.) matters?