Design a fitness function $($f$)$ using conditional probability for selection of friends on social media. It should dynamically tell you the best friend for the day $($based on distance $=$ d$,$ availability $=$ a and mood at the moment $=$ b$).$ Here different friends compete for friendship and then there is multi$-$point cross over and mutation to create new expected behavior of the friend $$ and that behavior is used to find friends. Design a detailed genetic algorithm$-$based approach for the same. Provide detailed diagram and pseudo code.