A local basketball league recorded the points scored by its players over several games. The total points scored by each player during the last five games are as follows:
Player A: 20, 18, 15, 22, 19
Player B: 15, 25, 20, 10, 30
Player C: 12, 18, 21, 17, 15
Player D: 30, 28, 20, 25, 22
To analyze the performance of these players, calculate the mean points scored by each player. What is the mean score of Player B?