The distributed storage system of a certain manufacturer has been put into operation for 100 days and runs 24 hours a day. A failure occurred in the morning of the 10th day, and it took 1 hour to…

The distributed storage system of a certain manufacturer has been put into operation for 100 days and runs 24 hours a day. A failure occurred in the morning of the 10th day, and it took 1 hour to recover from the failure. A failure occurred in the morning of the 25th day, and it took 4 hours to recover from the failure. A failure occurred in the morning of the 80th day, and it took 1 hour to recover from the failure. The availability of the software system is?