it's built so far which is a 10-1 symbol tree which we know is optimal by induction and we're good to go alright so click recap of everything we covered entropy is the expected encoding length when encoding each symbol with this length and so there's the equation for entropy atmosphere for 1948 so that every data source P of X is an order 0 Markov model which means there's no dependencies between symbols like that you are accounted for or able to come for then a compression scheme that independent codes each symbol in your