part c needed

An office manager has recelved a report from a consultant that includes a section on equipment repiacement. The report indicates that scanners have a service life that is normally distributed with a mean of 46 months and a standard deviation of 4 months. On the basis of this information, determine the proportion of scanners that can be expected to fail in the following time periods: Use Table A and Table B. a. Before 37 months of service. (Round z values to 2 decimal places, probability calculations to 4 decimal places and your final answer to 4 decimal places.) b. Between 44 and 48 months of service. (Round z values to 2 decimal places, probability calculations to 4 decimal places and your final answer to 4 decimal places.) c. Within 3 months of the mean life. (Round x values to 2 decimal places, probability calculations to 4 decimal places and your final answer to 4 decimal places.)