Computers A and B have the same ISA, but have different implementations. Computer A Computer B Program P1 Clock Frequency 2.4 GHz 3.3 GHz CPI for Instruction Class C1 4 5 40% CPI for Instruction Class C2 3 5 20% CPI for Instruction Class C3 4 6 30% CPI for Instruction Class C4 3 2 10% (a) Calculate the CPIAVG for program P1 on each computer. (b) For program P1, determine which computer executes faster and by how much. (c) You want to improve the performance of computer A. You found a method to half the CPI of an instruction class, but the method can be applied only to a single class.

Suppose you are an ad-serving company and you maintain a log of cookie data for ads you serve to the web pages for a particular vendor (say amazon). a. how can you use this data to determine which are the best ads? b. how can you use this data to determine which are the best ad formats? c. how could you records of past ads and ad clicks to determine which ads to send to a given ip address? d. how could you use this data to determine how well the technique you used in your answer to part c was working? e. how could you use this data to determine that a given ip address is used by more than one person? f. how does having this data give you a competitive advantage vis-à-vis other ad-serving companies?