I played baseball with my son on the camping trip. we invented a game called fielding practice. he got 10 points for catching a pop fly and making a good throw, 8 points for catching a pop fly and making a bad throw, 7 points for fielding a ground and making a good throw, 5 points for fielding a grounder and making a bad throw, and one point after making a good throw after a catching error what are all the possible ways he could get 20 points