The function prototype double mySqrt(int x); Declares a function called mySqrt which takes a double as an argument and returns an integer. Defines a function called mySqrt which takes an argument of type x and returns a double. Declares a function called mySqrt which takes an integer as an argument and returns a double. Defines a function called double which calculates square roots.

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?