A uniprocessor system uses a separate instruction and data caches with the hit ratios hi and hd, respectively. The access time from the processor to either cache is c clock cycles, and the block is transfer time between the caches and main memory is b block cycles. Among all memory references made by the CPU, fi is the percentage of the references to instructions. Among blocks replaced in the data cache, fdir is the percentage of dirty blocks. Assuming a write-back policy, determine the effective memory access time in terms of hi, hd, c, b, ff, fdir for this memory system