6. The model-based reinforcement learner allows for a different form of optimism in the face of uncertainty. The algorithm can be started with each state having a transition to a “nirvana” state, which has very high Q-value (but which will never be reached in practice, and so the probability will shrink to zero).

(a) Does this perform differently than initialing all Q-values to a high value? Does it work better, worse or the same?

(b) How high does the Q-value for the nirvana state need to be to work most effectively?

Suggest a reason why one value might be good, and test it.

(c) Could this method be used for the other RL algorithms? Explain how or why not.