hope this helps
Mars is the second smallest planet in the Solar System, and the fourth planet from the Sun. Its name is a tribute to the Roman god of war, and because of its coloration, it is also known as the "Red Planet." The surface gravity of Mars is about 37% of the gravity found on Earth. This means that, in theory, you could jump 3 times higher on the red planet than on Earth. The surface gravity of mars is usually presented with the "Meters / Second²" unit of measure.
your answer would be a. 12.5 kg
its first and third is your answer i did the qustion the fourth isnt right