3. It is generally recognized that it's wise to back up computer data. Assume that there is a 3% rate of disk drive failure in a year. d. Describe the improved reliability that is gained with backup drives: a) The probability of total loss is substantially reduced by adding backup drives b) The probability of total data loss is slightly increased by adding backup drives c) The probability of total data loss is not changed by adding one backup drive, but it is dramatically reduced by adding two backup drives d) The probability of total data loss is not changed by adding backup drives