K 3. (1) Using UCB for demand learning, select arm with index a? = argmajil + , what role J I does Ji play here and why? i (2) Suppose each period you need to choose a price among {3, 4, 5} to maximize revenue, and now you are at the beginning of period 7. You have all the historical data from periods 1-6. Let p(t) and d(t) be the price and demand you observed during period t. You have, p(l)=3, d(1)=10; p(2) 4, d(2) 8; p(3) S,d(3) 7;p(4) 4,d(4) 5;p(5) 4, d(S) 7;p(6) 4, d(6) 8. Let K=1.What price to pick for period 7 and why