The average life of a battery is advertised as 70.0 hours. A quality control check found that the mean life was normally distributed at 70.0 hours, with a standard deviation of 17.0 hours. Refer to the table in Appendix B1. (Round z score computation to 2 decimal places and the final answer to 4 decimal places.) a. Compute the probability of a mean life between 63.0 and 88.0 hours. Probability b. Compute the probability of a mean life less than 63.0 hours. Probability c. Compute the probability of a mean life between 47.0 and 54.0 hours. Probability