Planet mars has a very thin atmosphere composed mostly of carbon dioxide, its molar mass is 43.34 kg/kg-mol. the average atmospheric pressure at its surface is 0.087 psi. its average temperature is -60 degrees celsius at all altitudes. mars' gravity is 3.71 m/s^2, and its average diameter is 6,779 km. a. what is mars atmosphere's gas constant rin (both si units and english engineering units)? b. what is this atmosphere's density at the surface (both si units and english engineering units)? c. calculate mars' atmospheric density and pressure at a geometric altitude of 10km, when the parachute of a lander usually opens (both si units and english engineering units). d. if this lander is falling at approximately 600 m/s, how rapidly are both the density and pressure rising with respect to time?