a computer with a cache memory interposed between the processor and the primary memory, the cache is k$-$way set associative $($for some fixed k$)$; i$.$e$.,$ each location in primary memory "maps to$"($can be cached in$)$ any of k locations in the cache. Let there be P locations in primary memory and C locations in the cache.On the average, how many different locations in primary memory map to a particular location in the cache if k $=2?$