. (10pts) Here is a series of address references given as word addresses: 1, 20, 9,4, 17,9, 11, 4, 9.20, 17 Assume a direct-mapped cache with 8 one-word blocks that initially empty, label each memory reference in the list as a hit or a miss and complete the cache table below. Assume memory address is 6-bit long (given in parenthesis). What is the hit rate? Tag Cache Valid Block bit Data Reference Hit or miss 1 (000001) 20 (010100) 9 (001001) 4 (000100) 17 (010001) 9 (001001) 11 (001011) 4 (000100) 9 (001001) 20 (010100) 17 (010001) hit rate