I NEED HELP ! I'LL GIVE THE BRAINLEST ! OUT OF CONTEXT ANSWERS (LIKE 'hadhdjh') WILL BE REPORTED !!!!!

Answer:
Answer to A would be 147872265.5 km squared.
I don't really have enough information to get B and C. But i can help. To get the people per kilometer, you divide the number of people by 147872265.5. And you can do the same for ants. Then for C. you divide the number of ants by the number of people. Hope this helps!