A cat gave birth to $4$ kittens. Three of the kittens had different masses between $147$ and $159\,\text{g}$, and one kitten had a mass of $57\,\text{g}$. [[☃ explanation 1]] The kitten that had a mass of $57\,\text{g}$ was then adopted, so that kitten was removed from the data set. **How will the removal of the kitten affect the mean and median?** [[☃ radio 1]]