The manager of a company has purchased a computer to enable him monitor activities in the organization. He was advised to take into consideration the access time of the computer. He was given an invoice with the following details; memory access time of 1520ns, first level (L1) and second level (L2) cache access time of 250ns respectively. If the hit ratio of L1 and l2 are 0.5 and 0.3 respectively, Determine the Average Access time of the computer.