An institution has a 1.54 Mbps

access link to the public Internet and a 1 Gbps LAN. A local web cache is

implemented with a cache hit rate of 0.5, meaning 50% of requests are served

locally with negligible delay. The remaining 50% of requests must be retrieved

from origin servers over the Internet. The average data rate to browsers per

second is 1.80 Mbps.

What is the new access link

utilisation after introducing caching? Please give your answer as a percentage.