You get a report from neighbors near the Zapotecas, in San Andrs Calpan, complaining about bad smells. You are concerned that the gases coming from the landfill nearby might be responsible for the bad smell, and might include methane concentrations, which could be very dangerous. To evaluate this, the first thing you need to do is to determine the methane diffusion coefficient. Since, at a landfill, the production of methane (CH4) is usually accompanied by carbon monoxide (CO), you need to estimate the diffusion coefficient of methane (CH4) assuming that the air mixture is 20% O2, 77% N2, 1.7% CH4, and 1.3% CO. Estimate the diffusivity of CH4 in the gas mixture at 30C and 1.013 x 105 Pa-