A cloud provider is deploying a new SaaS product comprised of a cloud service. As part of the development, the cloud provider wants to publish a service level agreement(SLA) that provides an availability over the next 12 months. First, the cloud provider estimates that, based on historical data of the cloud environment, there is a 25% chance that the physical server hosting the cloud service will crash and that such a crash would last two days before the cloud service could be restored. It is further estimated that over the course of a 12 month period there will be various attacks on the cloud service, resulting in a total of 24 hours of downtime. Based on these estimates, what is the availability rating of the cloud service that should be published in the SLA?