What is the availability of Port 2 in that week?

A Fibre Channel switch has eight ports and all ports must be operational from 8 AM to 8 PM, Monday through Friday.

However, a failure of Port 2 occurs on a particular week as follows:

– Monday = 10 AM to 12 PM

– Wednesday = 4 PM to 9 PM

– Thursday = 4 PM to 7 PM

– Friday = 3 PM to 6 PM

– Saturday = 9 AM to 1 PM

What is the availability of Port 2 in that week?
A . 70%
B . 71.6%
C . 78.3%
D . 80%