The year is 2030 and Elon Musk has succeeded in establishing a human outpost on planet Mars. Mr. Musk decides to hire an undergrad from EAS 270 to lead the team to terraform Mars (i.e. make the Martian atmosphere habitable for humans). You are that individual. You know that the composition of the Martian atmosphere is 95% CO2, 3% N2, and 2% Ar gas. The atmospheric pressure on the surface of Mars is 0.7 kPa, the radius of Mars is 3390 km, and the gravitational acceleration on Mars is 3.71 m/s2 . 15 marks (a) Calculate the total mass (kg) of CO2 in the Martian atmosphere (show your units in the calculation; for simplicity you can assume that the mass of CO2 is 95% of the total mass). 5 marks (b) You decided to create large greenhouses in which you will grow plants to uptake CO2 and produce O2 via photosynthesis. You determine that your greenhouses can uptake 123 Pg of CO2 per year by photosynthesis (one pentagram is 1015 g or 1012 kg), but will also release 100 Pg of CO2 per year due to respiration and decomposition, for a net uptake of 23 Pg CO2 per year. How