The beaver1 and beaver2 datasets contain body temperatures of two beavers. Add a column named id to the beaver1 dataset, where the value is always 1. Similarly, add an id column to beaver2, with value...

The beaver1 and beaver2 datasets contain body temperatures of two beavers. Add

a column named id to the beaver1 dataset, where the value is always 1. Similarly,

add an id column to beaver2, with value 2. Vertically concatenate the two data

frames and find the subset where either beaver is active. [10]