Answer the following questions using data from Table 9.2. 1. A company spends $10,000 per year on courier services. Determine the resulting life cycle emission of carbon dioxide and benzene. What type of network model did you use for this calculation? 2. A household's annual expenses include $1000 for gasoline, $800 for electricity, and $300 for vehicle repair. Determine the cropland needed to supp these expenses. Explain which steps of the life cycle may require the cropland most.