After the launch rocket releases your probe in Low Earth Orbit, it will take 4.3 kms to transfer to a Mars transfer orbit, 0.9kms to

After the launch rocket releases your probe in Low Earth Orbit, it will take 4.3 kms¯¹ to transfer to a Mars transfer orbit, 0.9kms¯¹ to enter Mars capture orbit instead of flying by, and 1.4kms¯¹ to go from the wildly elliptical capture orbit to the desired low Mars orbit. Adding it all up, the mission requires a total Av of 6.6kms¯¹. The probe's instruments and structure have ended up massing 500kg. The probe has a chemical rocket with a specific impulse (ve) of 3kms¹. What is the minimum mass of propellant the probe needs to complete its mission?