It is 2020,What year would the next harvest moon be?Also when is the next blue moon as well?(Btw this is and addition problem)

Thirteen bowlers were asked what their score was on their last game. the scores are shown below 190,150,154,194,181,190,170,151,170 ,178,161,180 find the range of the bowlers score a.56 b.44 c.34 d.23