Compute 2 New Columns From The Iris Dataset. Save Your Work To… College Application Essay Help Online

compute 2 new columns from the iris dataset.
Save your work to iris_df
make a length_average that is the mean of the Sepal.Length and Petal.Length
make a width_average that is the mean of the Sepal.Width and Petal.Width
i need help in how should I code this