Question: 2. Explain in your own words, why is it hard to measure the ClickThrough Rate? 3. Consider the following scenario: There are three advertisers A,

2. Explain in your own words, why is it hard to measure the ClickThrough Rate?

3. Consider the following scenario: There are three advertisers A, B, and C A bids on query x, B bids on x and y, and C bids on x, y, and z All have budgets of $3.

Given the following query stream: x x x y y y z z z

a) What are the sequences of choices for both the greedy algorithm assuming the worst case scenario and the BALANCE algorithm?

b) What are the competitive ratios for both algorithms in this scenario?

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