Question 4 :You receive an e-mail from a good friend. It tells you go look at a website where they found surf boards for sale. You know your friend is not interested in surfing. The URL looks like this: http://radonwaterproof. Pl/decking/wonder. Php?Lead=1ke36kr0zt78av0 What kind of common threat is this message?

Acomputer has a two-level cache. suppose that 60% of the memory references hit on the first level cache, 35% hit on the second level, and 5% miss. the access times are 5 nsec, 15 nsec, and 60 nsec, respectively, where the times for the level 2 cache and memory start counting at the moment it is known that they are needed (e.g., a level 2 cache access does not even start until the level 1 cache miss occurs). what is the average access time?