Figure 1 Atmospheric CO2 data, 1950-2017, from the Mauna Loa site, ftp://aftp.cmdl.noaa.gov/products/trends/co2/co2_annmean_mlo.txt, with a fitted curve. Answer the following questions using the fitted curve, , that is represented in Figure 1. 1. Find a model with output Average CO2 in PPM and input years (or years after 1950). [Either delete this question or the figure, in which case provide the data.] 2. According to the model what will CO2 levels be in 2050? 3. What is the rate of change of CO2 in 2019 (the last year of the data set) and what is the percentage rate of change? 4. Assuming that CO2 levels continue to grow constantly at the 2019 rates, what will the CO2 levels reach in 2050? 5. Atmospheric CO2 levels of 450ppm yield a likely chance that global average temperature increases will be at least 20 Celsius. According to the model, in what year do we reach a CO2 level of 450ppm? If we assume CO2 levels continue to grow constantly at the 2018 rates, in what year do we reach a CO2 level of 450ppm