CSCI 430 please try do all step and explanation

stion 26 (25 points) omputer has a cache, main memory, and a disk used for virtual memory. If a erenced word is in the cache, 20 ns are required to access it. If it is in main mory, but not in the cache, 60 ns are needed to load it into the cache (this udes the time to originally check the cache), and then the references is started in. If the word is not in main memory, 12 ms are required to fetch the word fro -, followed by 60 ns to copy it to the cache, and then the reference is started n. The cache hit ratio is 0.9 and the main-memory hit ratio is 0.6. What is the -age time in ns required to access a referenced word on this system? w your work for this problem. Please discuss or explain the steps you used to Our final answer (e.g. if you just give me the final average access time and it is ng, you will not receive any points). For your reference, 1 ms (millisecond) = 0,000 ns (nanoseconds)