hii can someone help me with this no one has been able to help me and im really struggling it would be greatly appreciated <3

Ammonia molecules have three hydrogen atoms and one nitrogen atom.how many of each atom arein five molecules of ammonia

An object is translated by (x + 4, y - 2). if one point in the image has the coordinates (5, -3), what would be the coordinates of its pre-image? (9, -5) (1, -5) (9, -1) (1, -1)

Mr.walker is looking at the fundraiser totals for the last five years , how does the mean of the totals compare to the median?