In the Storing Guesses video, why is mAnswer= answer, mHits = "", and mMisses = "" ?

When you say mAnswers = “” and mHits = “” you are setting these variables so that they are an empty string. By setting the values of mAnswer and mHits, you are making sure that you have something to work with incase you try to manipulate it in way that means you think it has data but it really does not. For example, if you try to display the contents of it without any data you will get an error, but you won’t if you set it to an empty string. Setting variables can be a good idea when you create them because you have control over what is stored in that variable. Otherwise it is filled with ’garbage data’

When you create a game, you first need to know the answer to the game so that you can see if guesses are right or wrong. You pass in answer as a parameter when you create the game and then set it as "mAnswer" to keep track of it.

You start "mHits" and "mMisses" as an empty string when you first create the game because there wouldn't have been any guesses/misses yet. Later on when a player makes a guess and hits/misses, you will then change what is inside "mHits" and "mMisses".