[25] 4. Consider the scenario where global CO2 emissions increase at an exponential rate of growth of 1.15% / year from 2010 to 2040, stay constant for the next 10 years to 2050, then decrease at 3 %/year to 2100. Given the global CO2 emission rate in 2010 of 3.27 x 1013 kg CO₂/yr and a CO₂ mixing ratio in 2010 of 390 ppmv, calculate: [20] a. The equilibrium temperature change in the year 2100 since pre-industrial era given a AT2x value of 3 ˚C. [5] b. Is the resulting temperature change a concern for future generations?