Effects of shifting, adding, & removing a data point

Mariah works at a zoo. She was looking at some data showing the masses of their $5$5 African elephants. The mean mass of the elephants was $3{,}800\,{\text{kg}}$3, comma, 800, start text, k, g, end text, and the median mass was $3{,}600\,{\text{kg}}$3, comma, 600, start text, k, g, end text. The heaviest elephant, named Omar, was recorded as $6{,}000\,{\text{kg}}$6, comma, 000, start text, k, g, end text.

Mariah found out that Omar's mass was recorded incorrectly, and that Omar actually weighed $7{,}000\,{\text{kg}}$7, comma, 000, start text, k, g, end text.

How will Omar's mass increasing affect the mean and median?