A space probe lands on a planet with 1/2 the gravitational force as the earth. What happens to the mass and weight of the space probe?

A. The mass and weight are both halved

B. The mass and weight stays the same

C. The weight stays the same

D. The mass stays the same, the weight is halved

Mary starts from her house, walks 80 meters south, and stops to chat with her aunt on the sidewalk. after chatting for a few minutes, she walks 125 meters to the west to meet a friend and then walks 45 meters north with her friend to a cafe for lunch. overall, she takes 10 minutes to do all this. what is mary’s average speed?