Consider a system that automatically categorises Instagram posts from people you follow into 2 categories: Interesting and Yet-Another-Selfie.

a) Describe briefly how you would train the classifier.

b) List 2-3 features that you may consider using in the training phase.

c) Show using proper notation what conditional probabilities the classifier will learn in the training phase.

d) A new post arrives. Using appropriate Bayesian formulas, show how the classifier would decide in which class to place the new post