In the recent past, the production output has been between 10,000 and 20,000 units per week 75% of the time; however, it may fall below 10,000 or go above 20,000 more frequently in the future. The production manager wants to use E(output) to make a decision about upgrading automation software. Identify at least two additional pieces of information that must be obtained or assumed to finalize the output information for this use.